diff --git a/.changeset/dynamic-tag-owner-compare.md b/.changeset/dynamic-tag-owner-compare.md
new file mode 100644
index 00000000000..f86ebaa50b7
--- /dev/null
+++ b/.changeset/dynamic-tag-owner-compare.md
@@ -0,0 +1,5 @@
+---
+"@marko/runtime-tags": patch
+---
+
+Fix a dynamic tag silently ignoring a switch between two instances of the same content section (e.g. two `<define>` contents from two instances of one provider tag, or the list-detail pattern `<${selected.content}/>`). The change check compared only the shared content id, so no teardown or re-render occurred and closures stayed subscribed to the old owner. Renderers now also compare their owner scope, and SSR serializes an owned renderer's registered reference so resumed slots stay instance-aware.
diff --git a/.sizes.json b/.sizes.json
index c766e3320f8..9eb6773c65e 100644
--- a/.sizes.json
+++ b/.sizes.json
@@ -7,8 +7,8 @@
     {
       "name": "*",
       "total": {
-        "min": 25964,
-        "brotli": 9537
+        "min": 26049,
+        "brotli": 9582
       }
     },
     {
diff --git a/.sizes/dom.js b/.sizes/dom.js
index ef2e7f9866d..f2f95596294 100644
--- a/.sizes/dom.js
+++ b/.sizes/dom.js
@@ -1,4 +1,4 @@
-// size: 25964 (min) 9537 (brotli)
+// size: 26049 (min) 9582 (brotli)
 //#region packages/runtime-tags/dist/dom.mjs
 let empty = [],
   rest = Symbol(),
@@ -99,9 +99,7 @@ let empty = [],
       (scope, newRenderer, getInput) => {
         let normalizedRenderer = normalizeDynamicRenderer(newRenderer);
         if (
-          scope[rendererAccessor] !==
-            (scope[rendererAccessor] =
-              normalizedRenderer?.a || normalizedRenderer) ||
+          rendererChanged(scope, rendererAccessor, normalizedRenderer) ||
           (getContent && !(normalizedRenderer || scope[childScopeAccessor]))
         )
           if (
@@ -1633,7 +1631,7 @@ function attrsInternal(scope, nodeAccessor, nextAttrs) {
 }
 function _attr_content(scope, nodeAccessor, value) {
   let content = normalizeClientRender(value);
-  scope["D" + nodeAccessor] !== (scope["D" + nodeAccessor] = content?.a) &&
+  rendererChanged(scope, "D" + nodeAccessor, content) &&
     (setConditionalRenderer(scope, nodeAccessor, content, createAndSetupBranch),
     content?.f &&
       subscribeToScopeSet(content.e, content.f, scope["A" + nodeAccessor]));
@@ -2044,6 +2042,15 @@ function _show(nodeAccessor, startNodeAccessor) {
 function patchDynamicTag(fn) {
   _dynamic_tag = fn(_dynamic_tag);
 }
+function rendererChanged(scope, rendererAccessor, renderer) {
+  let prev = scope[rendererAccessor],
+    changed =
+      (prev?.a || prev) !== (renderer?.a || renderer) ||
+      (typeof prev != "string" &&
+        typeof renderer != "string" &&
+        prev?.e !== renderer?.e);
+  return ((scope[rendererAccessor] = renderer), changed);
+}
 function _dynamic_tag_content(nodeAccessor) {
   nodeAccessor = decodeAccessor(nodeAccessor);
   let childScopeAccessor = "A" + nodeAccessor,
@@ -2052,8 +2059,7 @@ function _dynamic_tag_content(nodeAccessor) {
     enableBranches(),
     (scope, renderer) => {
       if (
-        (scope[rendererAccessor] !==
-          (scope[rendererAccessor] = renderer?.a || renderer) &&
+        (rendererChanged(scope, rendererAccessor, renderer) &&
           (setConditionalRenderer(
             scope,
             nodeAccessor,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-class-to-tags/sizes.json
index a44f7bdc96d..5a33189336b 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 66703,
-        "brotli": 20489
+        "min": 66801,
+        "brotli": 20512
       },
       "files": {
         "components/tags-counter.marko": 681,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-tags-to-class/sizes.json
index 33a70b4f993..f5c4150913c 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-basic-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68311,
-        "brotli": 21125
+        "min": 68409,
+        "brotli": 21195
       },
       "files": {
         "components/class-counter.marko": 1028,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-class-to-tags-import/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-class-to-tags-import/sizes.json
index a44f7bdc96d..5a33189336b 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-class-to-tags-import/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-class-to-tags-import/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 66703,
-        "brotli": 20489
+        "min": 66801,
+        "brotli": 20512
       },
       "files": {
         "components/tags-counter.marko": 681,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-class-to-tags/sizes.json
index 59aa49f9f95..05cc2af0e3c 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 66601,
-        "brotli": 20409
+        "min": 66699,
+        "brotli": 20493
       },
       "files": {
         "components/tags-child.marko": 509,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-conditional-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-conditional-class-to-tags/sizes.json
index 98ba9762f55..34c74d196e3 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-conditional-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-dynamic-tag-conditional-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 66642,
-        "brotli": 20447
+        "min": 66740,
+        "brotli": 20468
       },
       "files": {
         "components/tags-child.marko": 509,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-inline-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-inline-tags-to-class/sizes.json
index 7f0d11cd6e2..bbca4759dd9 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-inline-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-inline-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68303,
-        "brotli": 21107
+        "min": 68404,
+        "brotli": 21141
       },
       "files": {
         "components/inline-button.marko": 1094,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-split-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-split-tags-to-class/sizes.json
index d4206ca5c8f..9a36bc05476 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-split-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-emit-split-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68422,
-        "brotli": 21165
+        "min": 68520,
+        "brotli": 21234
       },
       "files": {
         "components/split-button/component-browser.js": 373,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-class-to-tags/sizes.json
index b306ce9a2b9..0e704c1d37e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 66741,
-        "brotli": 20505
+        "min": 66839,
+        "brotli": 20551
       },
       "files": {
         "components/tags-pinger.marko": 663,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-handler-render-body-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-handler-render-body-tags-to-class/sizes.json
index e9c3b8f278e..e6dab5c4fda 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-handler-render-body-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-handler-render-body-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68607,
-        "brotli": 21263
+        "min": 68705,
+        "brotli": 21320
       },
       "files": {
         "components/my-button.marko": 1048,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-split-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-split-class-to-tags/sizes.json
index ad6fbcab1fb..5b3a0fe1b89 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-split-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-event-split-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 69833,
-        "brotli": 21527
+        "min": 69931,
+        "brotli": 21607
       },
       "files": {
         "components/tags-pinger.marko": 706,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-events-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-events-tags-to-class/sizes.json
index b62c2c2da13..c8f979c5283 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-events-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-events-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68243,
-        "brotli": 21070
+        "min": 68343,
+        "brotli": 21134
       },
       "files": {
         "components/class-counter.marko": 1043,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-mixed-inert-and-stateful-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-mixed-inert-and-stateful-tags-to-class/sizes.json
index b120a6eaee0..bd7b7fe4797 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-mixed-inert-and-stateful-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-mixed-inert-and-stateful-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68311,
-        "brotli": 21154
+        "min": 68409,
+        "brotli": 21217
       },
       "files": {
         "components/class-counter.marko": 1028,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-attr-tags-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-attr-tags-class-to-tags/sizes.json
index d01fc5d01e0..132dfec37a3 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-attr-tags-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-attr-tags-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 67008,
-        "brotli": 20605
+        "min": 67106,
+        "brotli": 20602
       },
       "files": {
         "components/tags-layout.marko": 838,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-class-to-tags/sizes.json
index 896f9d2b743..3e90c921700 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 66680,
-        "brotli": 20507
+        "min": 66778,
+        "brotli": 20548
       },
       "files": {
         "components/tags-layout.marko": 696,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-tags-to-class/sizes.json
index 64fb57b0116..a4452c713bc 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-nested-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68751,
-        "brotli": 21327
+        "min": 68849,
+        "brotli": 21357
       },
       "files": {
         "components/class-layout.marko": 1227,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-reactive-split-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-reactive-split-tags-to-class/sizes.json
index ece53edead9..a1c39c16a21 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-reactive-split-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-reactive-split-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68253,
-        "brotli": 21082
+        "min": 68351,
+        "brotli": 21118
       },
       "files": {
         "components/split-display/component-browser.js": 182,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-rerender-inert-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-rerender-inert-class/sizes.json
index a1c956bbee9..e3704a9e341 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-rerender-inert-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-rerender-inert-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 67923,
-        "brotli": 20984
+        "min": 68021,
+        "brotli": 21056
       },
       "files": {
         "components/class-display.marko": 856,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-roundtrip-split-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-roundtrip-split-tags-to-class/sizes.json
index 4dd59d5750b..60fcea73c22 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-roundtrip-split-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-roundtrip-split-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68416,
-        "brotli": 21169
+        "min": 68517,
+        "brotli": 21210
       },
       "files": {
         "components/split-counter/component-browser.js": 228,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-stateless-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-stateless-tags-to-class/sizes.json
index 64170363ffe..99967fd2672 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-stateless-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-stateless-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 68026,
-        "brotli": 21034
+        "min": 68124,
+        "brotli": 21003
       },
       "files": {
         "components/my-button/component-browser.js": 457,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-class-to-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-class-to-tags/sizes.json
index 2a270a61445..8338810165c 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-class-to-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-class-to-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 67062,
-        "brotli": 20656
+        "min": 67160,
+        "brotli": 20696
       },
       "files": {
         "components/tags-layout.marko": 912,
diff --git a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-tags-to-class/sizes.json b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-tags-to-class/sizes.json
index 9f6dbf0d438..d3cc9f5165d 100644
--- a/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-tags-to-class/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures-interop/interop-tag-params-tags-to-class/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 69111,
-        "brotli": 21500
+        "min": 69209,
+        "brotli": 21508
       },
       "files": {
         "components/class-layout.marko": 1245,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/at-tags-dynamic-with-params/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/at-tags-dynamic-with-params/sizes.json
index a7a8cf2ff68..acc4ee2eac6 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/at-tags-dynamic-with-params/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/at-tags-dynamic-with-params/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13437,
-        "brotli": 5145
+        "min": 13535,
+        "brotli": 5178
       },
       "files": {
         "tags/hello/index.marko": 194,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.debug.html
index 5a2f55fb60a..306f5dddc2b 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.debug.html
@@ -11,10 +11,10 @@
       y: 2,
       "#childScope/1": _(2)
     }, {
-      "ConditionalRenderer:#text/0": "packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/template.marko_1_content",
-      content: _(1,
+      "ConditionalRenderer:#text/0": _.a = _(1,
         "packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/template.marko_1_content"
-        )
+        ),
+      content: _.a
     }, {
       outer: 1,
       _: _(1),
diff --git a/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.html
index e7abeca787c..bf8b33c70d7 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/__snapshots__/writes.html
@@ -11,8 +11,8 @@
     d: 2,
     b: _(2)
   }, {
-    Da: "a1",
-    d: _(1, "a1")
+    Da: _.a = _(1, "a1"),
+    d: _.a
   }, {
     c: 1,
     _: _(1),
diff --git a/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/sizes.json
index 52cc96c3c53..2bc78215db4 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/basic-nested-params/sizes.json
@@ -2,8 +2,8 @@
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     "template.marko.page.mjs": {
       "total": {
-        "min": 14018,
-        "brotli": 5390
+        "min": 14116,
+        "brotli": 5421
       },
       "files": {
         "tags/child.marko": 432,
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 494,
-    "brotli": 330
+    "min": 497,
+    "brotli": 333
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.debug.html
index f271a4d054e..1f9d114d92d 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.debug.html
@@ -6,11 +6,11 @@
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     "#childScope/0": _(2)
   }, 1, {
-    content: _(1,
+    content: _.a = _(1,
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       )
   }, {
-    "ConditionalRenderer:#text/0": "packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/template.marko_1_content",
+    "ConditionalRenderer:#text/0": _.a,
     _: _(3)
   }, {
     _: _(1)
diff --git a/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.html
index 98f29e39be2..480c5b92472 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/__snapshots__/writes.html
@@ -6,9 +6,9 @@
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     a: _(2)
   }, 1, {
-    d: _(1, "a1")
+    d: _.a = _(1, "a1")
   }, {
-    Da: "a1",
+    Da: _.a,
     _: _(3)
   }, {
     _: _(1)
diff --git a/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/sizes.json
index c94b5398ab5..4c761567e19 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/conditional-dynamic-tag-in-loop-closure/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 15623,
-        "brotli": 6089
+        "min": 15721,
+        "brotli": 6131
       },
       "files": {
         "tags/sections.marko": 736,
@@ -12,7 +12,7 @@
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   },
   "html": {
-    "min": 449,
-    "brotli": 295
+    "min": 452,
+    "brotli": 300
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 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/controllable-dialog-open-spread/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/controllable-dialog-open-spread/sizes.json
index a3f198d0006..99144544386 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/controllable-dialog-open-spread/sizes.json
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@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 10415,
-        "brotli": 3890
+        "min": 10525,
+        "brotli": 3932
       },
       "files": {
         "tags/my-dialog.marko": 244,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/controllable-select-dynamic-spread/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/controllable-select-dynamic-spread/sizes.json
index 1a82a83a8c7..40013887264 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/controllable-select-dynamic-spread/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/controllable-select-dynamic-spread/sizes.json
@@ -1,8 +1,8 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13658,
-      "brotli": 5207
+      "min": 13756,
+      "brotli": 5237
     }
   },
   "html": {
diff --git a/packages/runtime-tags/src/__tests__/fixtures/controllable-select-spread/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/controllable-select-spread/sizes.json
index 1a668367120..ee16a2c9549 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/controllable-select-spread/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/controllable-select-spread/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 11757,
-        "brotli": 4377
+        "min": 11867,
+        "brotli": 4421
       },
       "files": {
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.debug.html
index 508b39d614d..dbed54e03b1 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.debug.html
@@ -5,10 +5,10 @@
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-      "ConditionalRenderer:#text/3": "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/template.marko_1_content",
-      input_content: _(1,
+      "ConditionalRenderer:#text/3": _.a = _(1,
         "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/template.marko_1_content"
         ),
+      input_content: _.a,
       x: 1,
       y: 10
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.html
index e0d737c239f..e1dee5bb201 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/__snapshots__/writes.html
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 <script>
   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
-    Dd: "a0",
-    g: _(1, "a0"),
+    Dd: _.a = _(1, "a0"),
+    g: _.a,
     h: 1,
     i: 10
   }], "b0 2"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/sizes.json
index 9cbab83b0b8..8a6e7f90d34 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-args/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13572,
-        "brotli": 5195
+        "min": 13670,
+        "brotli": 5232
       },
       "files": {
         "tags/custom-tag.marko": 618,
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 486,
-    "brotli": 309
+    "min": 489,
+    "brotli": 310
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 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.debug.html
index 078dd591aaa..c75fc08d693 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.debug.html
@@ -4,10 +4,10 @@
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   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
-      "ConditionalRenderer:#text/2": "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/template.marko_1_content",
-      input_content: _(1,
+      "ConditionalRenderer:#text/2": _.a = _(1,
         "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/template.marko_1_content"
         ),
+      input_content: _.a,
       input_name: "hello",
       x: 1
     }],
diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.html
index c5e9011f78d..18ef009923f 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/__snapshots__/writes.html
@@ -3,8 +3,8 @@
 <script>
   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
-    Dc: "a0",
-    f: _(1, "a0"),
+    Dc: _.a = _(1, "a0"),
+    f: _.a,
     g: "hello",
     h: 1
   }], "b0 2"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/sizes.json
index bf0c22f173e..0c1c2441e07 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-attributes/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13556,
-        "brotli": 5193
+        "min": 13654,
+        "brotli": 5225
       },
       "files": {
         "tags/custom-tag.marko": 501,
@@ -12,7 +12,7 @@
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   },
   "html": {
-    "min": 476,
-    "brotli": 307
+    "min": 479,
+    "brotli": 308
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 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/__snapshots__/writes.debug.html
index aa33859088a..d9832fe346e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/__snapshots__/writes.debug.html
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-      "ConditionalRenderer:#text/2": "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/template.marko_1_content",
-      input_content: _(1,
+      "ConditionalRenderer:#text/2": _.a = _(1,
         "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/template.marko_1_content"
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+      input_content: _.a,
       x: 1
     }],
     "packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/tags/custom-tag.marko_0 2"
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index 9a833c32af7..2c76edecc55 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/__snapshots__/writes.html
@@ -3,8 +3,8 @@
 <script>
   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
-    Dc: "a0",
-    f: _(1, "a0"),
+    Dc: _.a = _(1, "a0"),
+    f: _.a,
     g: 1
   }], "b0 2"];
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/sizes.json
index 13bcd29ffdd..9c246f37746 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/custom-tag-parameters-from-single-arg/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13484,
-        "brotli": 5167
+        "min": 13582,
+        "brotli": 5198
       },
       "files": {
         "tags/custom-tag.marko": 446,
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 442,
-    "brotli": 294
+    "min": 445,
+    "brotli": 297
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 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/define-tag-content-conditional/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/define-tag-content-conditional/sizes.json
index 683d0815a96..3211b01448e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/define-tag-content-conditional/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/define-tag-content-conditional/sizes.json
@@ -1,8 +1,8 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 6410,
-      "brotli": 2911
+      "min": 6521,
+      "brotli": 2952
     }
   },
   "html": {
diff --git a/packages/runtime-tags/src/__tests__/fixtures/define-tag-for-attribute-tag/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/define-tag-for-attribute-tag/sizes.json
index 481f7fbf82c..1f8ea5a6962 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/define-tag-for-attribute-tag/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/define-tag-for-attribute-tag/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13387,
-        "brotli": 5125
+        "min": 13485,
+        "brotli": 5156
       },
       "files": {
         "tags/child.marko": 409,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.debug.html
index f5dbf6448e3..18b094b2b0e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.debug.html
@@ -6,7 +6,9 @@
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       "BranchScopes:#div/0": _(3),
-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/template.marko_1_content",
+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/template.marko_1_content"
+        ),
       $valueChange: _(1,
         "packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/template.marko_0/valueChange"
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.html
index 8eea681eb6d..bf0a6c5a6b2 100644
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+++ b/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/__snapshots__/writes.html
@@ -6,7 +6,7 @@
     c: new Set([_(3)])
   }, {
     Aa: _(3),
-    Da: "a1",
+    Da: _(1, "a1"),
     d: _(1, "a0")
   }, {
     _: _(1)
diff --git a/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/sizes.json
index 982b56f26a8..e4682c721a9 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/destructure-input-with-assignment/sizes.json
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 408,
-    "brotli": 296
+    "min": 413,
+    "brotli": 293
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 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.debug.html
index d2a72a0f650..7157a2c67ba 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.debug.html
@@ -3,12 +3,12 @@
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       "BranchScopes:#button/0": _(2),
-      "ConditionalRenderer:#button/0": "packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/template.marko_1_content",
+      "ConditionalRenderer:#button/0": _.a = _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/template.marko_1_content"
+        ),
       count: 0,
       MyThing: {
-        content: _(1,
-          "packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/template.marko_1_content"
-          )
+        content: _.a
       },
       "ClosureScopes:count": new Set([_(2)])
     }, {
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.html
index 512e20229e0..92266772349 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/__snapshots__/writes.html
@@ -3,10 +3,10 @@
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     Aa: _(2),
-    Da: "a0",
+    Da: _.a = _(1, "a0"),
     b: 0,
     c: {
-      content: _(1, "a0")
+      content: _.a
     },
     e: new Set([_(2)])
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/sizes.json
index 2ec66230e18..a08616940a3 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-content-attr/sizes.json
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@@ -1,12 +1,12 @@
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     "template.marko.page.mjs": {
-      "min": 5930,
-      "brotli": 2656
+      "min": 6040,
+      "brotli": 2697
     }
   },
   "html": {
-    "min": 419,
-    "brotli": 292
+    "min": 422,
+    "brotli": 296
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/__snapshots__/writes.debug.html
index d0ae46cdd62..69133587fae 100644
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+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/__snapshots__/writes.debug.html
@@ -7,7 +7,9 @@
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       className: "A"
     }, {
-      "ConditionalRenderer:#span/0": "packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/template.marko_1_content"
+      "ConditionalRenderer:#span/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/template.marko_1_content"
+        )
     }],
     "packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/template.marko_0 1"
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/__snapshots__/writes.html
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@@ -7,7 +7,7 @@
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-    Da: "a0"
+    Da: _(1, "a0")
   }], "a1 1"];
   M._.w()
 </script>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/sizes.json
index adeb8510eb6..df5aa5d5a47 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-dynamic-tag/sizes.json
@@ -1,12 +1,12 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13331,
-      "brotli": 5102
+      "min": 13429,
+      "brotli": 5136
     }
   },
   "html": {
-    "min": 442,
-    "brotli": 288
+    "min": 447,
+    "brotli": 295
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.debug.html
index b729557134a..39463707f5e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.debug.html
@@ -11,7 +11,9 @@
         "packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/template.marko_0/onClick"
         )
     },
-    "ConditionalRenderer:#span/0": "packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/template.marko_1_content",
+    "ConditionalRenderer:#span/0": _(1,
+      "packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/template.marko_1_content"
+      ),
     "#Renderer": "span"
   }], "_dynamicTagScript 2"];
   M._.w()
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.html
index 8027e87cf15..33ba0cf489b 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/__snapshots__/writes.html
@@ -8,7 +8,7 @@
     Ia: {
       click: _(1, "a0")
     },
-    Da: "a1",
+    Da: _(1, "a1"),
     R: "span"
   }], "d 2"];
   M._.w()
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/sizes.json
index 73771017f69..e174238ae06 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-native-tag-events/sizes.json
@@ -1,12 +1,12 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13220,
-      "brotli": 5044
+      "min": 13318,
+      "brotli": 5078
     }
   },
   "html": {
-    "min": 435,
+    "min": 440,
     "brotli": 293
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args-tag-var/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args-tag-var/sizes.json
index 0206085dcb3..014a6ad96c6 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args-tag-var/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args-tag-var/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 14170,
-        "brotli": 5401
+        "min": 14268,
+        "brotli": 5435
       },
       "files": {
         "tags/custom-tag.marko": 339,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args/sizes.json
index e07dfc3c5c2..766489da325 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-args/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13981,
-        "brotli": 5342
+        "min": 14079,
+        "brotli": 5373
       },
       "files": {
         "tags/custom-tag.marko": 289,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-conditional/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-conditional/sizes.json
index 7225d9b42d4..b1b9d670df9 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-conditional/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-conditional/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 6403,
-        "brotli": 2906
+        "min": 6514,
+        "brotli": 2948
       },
       "files": {
         "tags/inner.marko": 165,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/dom.bundle.debug.js b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/dom.bundle.debug.js
new file mode 100644
index 00000000000..15e1b718b1e
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/dom.bundle.debug.js
@@ -0,0 +1,37 @@
+// tags/panel.marko
+const $template$1 = "";
+const $walks$1 = "";
+const $section_content__input_label = /*@__PURE__*/ _closure_get("input_label", ($scope) => _text($scope["#text/0"], $scope._.input_label));
+const $section_content__setup = $section_content__input_label;
+const $section_content = _content_resume("__tests__/tags/panel.marko_1_content", "<span> </span>", "D l", $section_content__setup);
+const $section = /*@__PURE__*/ _const("section", ($scope) => _return($scope, { section: $scope.section }));
+function $setup$1($scope) {
+	$section($scope, { content: $section_content($scope) });
+}
+const $input = ($scope, input) => $input_label($scope, input.label);
+const $input_label__closure = /*@__PURE__*/ _closure($section_content__input_label);
+const $input_label = /*@__PURE__*/ _const("input_label", $input_label__closure);
+var panel_default = /*@__PURE__*/ _template("__tests__/tags/panel.marko", "", "", $setup$1, $input);
+
+// template.marko
+const $template = /*@__PURE__*/ ((_w0, _w1) => `${_w0}${_w1}<div><!></div><button>swap</button>`)("", "");
+const $walks = /*@__PURE__*/ ((_w0, _w1) => `0${_w0}&0${_w1}&D%l b`)("", "");
+const $dynamicTag = /*@__PURE__*/ _dynamic_tag("#text/4");
+const $idx__OR__a__OR__b = /*@__PURE__*/ _or(9, ($scope) => $dynamicTag($scope, ($scope.idx ? $scope.b : $scope.a).section), 2);
+const $idx = /*@__PURE__*/ _let("idx/6", $idx__OR__a__OR__b);
+const $setup__script = _script("__tests__/template.marko_0", ($scope) => _on($scope["#button/5"], "click", function() {
+	$idx($scope, 1 - $scope.idx);
+}));
+function $setup($scope) {
+	_var($scope, "#childScope/0", $a);
+	$setup$1($scope["#childScope/0"]);
+	$input_label($scope["#childScope/0"], "alpha");
+	_var($scope, "#childScope/2", $b);
+	$setup$1($scope["#childScope/2"]);
+	$input_label($scope["#childScope/2"], "beta");
+	$idx($scope, 0);
+	$setup__script($scope);
+}
+const $a = _var_resume("__tests__/template.marko_0_a/var", /*@__PURE__*/ _const("a", $idx__OR__a__OR__b));
+const $b = _var_resume("__tests__/template.marko_0_b/var", /*@__PURE__*/ _const("b", $idx__OR__a__OR__b));
+var template_default = /*@__PURE__*/ _template("__tests__/template.marko", $template, $walks, $setup);
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/dom.bundle.js b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/dom.bundle.js
new file mode 100644
index 00000000000..df9d8471f66
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/dom.bundle.js
@@ -0,0 +1,13 @@
+// tags/panel.marko
+const $section_content__input_label = /*@__PURE__*/ _closure_get(4, ($scope) => _text($scope.a, $scope._.c));
+const $section_content = _content_resume("b0", "<span> </span>", "D l", $section_content__input_label);
+
+// template.marko
+const $dynamicTag = /*@__PURE__*/ _dynamic_tag(4);
+const $idx__OR__a__OR__b = /*@__PURE__*/ _or(9, ($scope) => $dynamicTag($scope, ($scope.g ? $scope.i : $scope.h).section), 2);
+const $idx = /*@__PURE__*/ _let(6, $idx__OR__a__OR__b);
+const $setup__script = _script("a0", ($scope) => _on($scope.f, "click", function() {
+	$idx($scope, 1 - $scope.g);
+}));
+const $a = _var_resume("a1", /*@__PURE__*/ _const(7, $idx__OR__a__OR__b));
+const $b = _var_resume("a2", /*@__PURE__*/ _const(8, $idx__OR__a__OR__b));
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/html.bundle.debug.js b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/html.bundle.debug.js
new file mode 100644
index 00000000000..ad87e902ade
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/html.bundle.debug.js
@@ -0,0 +1,42 @@
+// tags/panel.marko
+var panel_default = _template("__tests__/tags/panel.marko", (input) => {
+	const $scope0_reason = _scope_reason(), $si__input_label = _serialize_if($scope0_reason, 0);
+	const $scope0_id = _scope_id();
+	const $input_label__closures = new Set();
+	const section = { content: _content_resume("__tests__/tags/panel.marko_1_content", () => {
+		const $scope1_id = _scope_id();
+		const $scope1_reason = _scope_reason();
+		_html(`<span>${_escape(input.label)}${_el_resume($scope1_id, "#text/0", _serialize_guard($scope0_reason, 0))}</span>`);
+		_subscribe($si__input_label && $input_label__closures, writeScope($scope1_id, { _: _scope_with_id($scope0_id) }, "__tests__/tags/panel.marko", "1:2"));
+		_resume_branch($scope1_id);
+	}, $scope0_id) };
+	const $return = { section };
+	writeScope($scope0_id, {
+		input_label: input.label,
+		"ClosureScopes:input_label": $si__input_label && $input_label__closures
+	}, "__tests__/tags/panel.marko", 0, { input_label: ["input.label"] });
+	return $return;
+});
+
+// template.marko
+var template_default = _template("__tests__/template.marko", (input) => {
+	_scope_reason();
+	const $scope0_id = _scope_id();
+	let idx = 0;
+	let a = panel_default({ label: "alpha" });
+	let b = panel_default({ label: "beta" });
+	_html("<div>");
+	_dynamic_tag($scope0_id, "#text/4", (idx ? b : a).section, {});
+	_html(`</div><button>swap</button>${_el_resume($scope0_id, "#button/5")}`);
+	_script($scope0_id, "__tests__/template.marko_0");
+	writeScope($scope0_id, {
+		idx,
+		a,
+		b
+	}, "__tests__/template.marko", 0, {
+		idx: "1:6",
+		a: "2:8",
+		b: "3:8"
+	});
+	_resume_branch($scope0_id);
+}, 1);
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/html.bundle.js b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/html.bundle.js
new file mode 100644
index 00000000000..6b826ca790f
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/html.bundle.js
@@ -0,0 +1,37 @@
+// tags/panel.marko
+var panel_default = _template("b", (input) => {
+	const $scope0_reason = _scope_reason(), $si__input_label = _serialize_if($scope0_reason, 0);
+	const $scope0_id = _scope_id();
+	const $input_label__closures = /* @__PURE__ */ new Set();
+	const $return = { section: { content: _content_resume("b0", () => {
+		const $scope1_id = _scope_id();
+		_scope_reason();
+		_html(`<span>${_escape(input.label)}${_el_resume($scope1_id, "a", _serialize_guard($scope0_reason, 0))}</span>`);
+		_subscribe($si__input_label && $input_label__closures, writeScope($scope1_id, { _: _scope_with_id($scope0_id) }));
+		_resume_branch($scope1_id);
+	}, $scope0_id) } };
+	writeScope($scope0_id, {
+		c: input.label,
+		e: $si__input_label && $input_label__closures
+	});
+	return $return;
+});
+
+// template.marko
+var template_default = _template("a", (input) => {
+	_scope_reason();
+	const $scope0_id = _scope_id();
+	let idx = 0;
+	let a = panel_default({ label: "alpha" });
+	let b = panel_default({ label: "beta" });
+	_html("<div>");
+	_dynamic_tag($scope0_id, "e", a.section, {});
+	_html(`</div><button>swap</button>${_el_resume($scope0_id, "f")}`);
+	_script($scope0_id, "a0");
+	writeScope($scope0_id, {
+		g: idx,
+		h: a,
+		i: b
+	});
+	_resume_branch($scope0_id);
+}, 1);
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/render.debug.md b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/render.debug.md
new file mode 100644
index 00000000000..2143bdbcf3b
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/render.debug.md
@@ -0,0 +1,53 @@
+# Render
+```html
+<div>
+  <span>
+    alpha
+  </span>
+</div>
+<button>
+  swap
+</button>
+```
+
+# Update
+```js
+container.querySelector(`button`).click();
+```
+```html
+<div>
+  <span>
+    beta
+  </span>
+</div>
+<button>
+  swap
+</button>
+```
+## Change
+```
+INSERT: div > span
+REMOVE: div > span + span
+UPDATE: div > span::text " " => "beta"
+```
+
+# Update
+```js
+container.querySelector(`button`).click();
+```
+```html
+<div>
+  <span>
+    alpha
+  </span>
+</div>
+<button>
+  swap
+</button>
+```
+## Change
+```
+INSERT: div > span
+REMOVE: div > span + span
+UPDATE: div > span::text " " => "alpha"
+```
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/render.md b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/render.md
new file mode 100644
index 00000000000..2143bdbcf3b
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/render.md
@@ -0,0 +1,53 @@
+# Render
+```html
+<div>
+  <span>
+    alpha
+  </span>
+</div>
+<button>
+  swap
+</button>
+```
+
+# Update
+```js
+container.querySelector(`button`).click();
+```
+```html
+<div>
+  <span>
+    beta
+  </span>
+</div>
+<button>
+  swap
+</button>
+```
+## Change
+```
+INSERT: div > span
+REMOVE: div > span + span
+UPDATE: div > span::text " " => "beta"
+```
+
+# Update
+```js
+container.querySelector(`button`).click();
+```
+```html
+<div>
+  <span>
+    alpha
+  </span>
+</div>
+<button>
+  swap
+</button>
+```
+## Change
+```
+INSERT: div > span
+REMOVE: div > span + span
+UPDATE: div > span::text " " => "alpha"
+```
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/writes.debug.html
new file mode 100644
index 00000000000..a3f7071a486
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/writes.debug.html
@@ -0,0 +1,32 @@
+<div><!--M_[--><span>alpha</span><!--M_]1 #text/4 4--></div>
+<button>swap</button><!--M_*1 #button/5-->
+<script>
+  WALKER_RUNTIME("M")("_");
+  M._.r = [_ => [1, {
+      "ConditionalRenderer:#text/4": _.a = _(2,
+        "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/tags/panel.marko_1_content"
+        ),
+      idx: 0,
+      a: {
+        section: {
+          content: _.a
+        }
+      },
+      b: {
+        section: {
+          content: _(3,
+            "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/tags/panel.marko_1_content"
+            )
+        }
+      }
+    }, {
+      input_label: "alpha"
+    }, {
+      input_label: "beta"
+    }, {
+      _: _(2)
+    }],
+    "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/template.marko_0 1"
+  ];
+  M._.w()
+</script>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/writes.html
new file mode 100644
index 00000000000..12632bd78ab
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/__snapshots__/writes.html
@@ -0,0 +1,26 @@
+<div><!--M_[--><span>alpha</span><!--M_]1 e 4--></div>
+<button>swap</button><!--M_*1 f-->
+<script>
+  WALKER_RUNTIME("M")("_");
+  M._.r = [_ => [1, {
+    De: _.a = _(2, "b0"),
+    g: 0,
+    h: {
+      section: {
+        content: _.a
+      }
+    },
+    i: {
+      section: {
+        content: _(3, "b0")
+      }
+    }
+  }, {
+    c: "alpha"
+  }, {
+    c: "beta"
+  }, {
+    _: _(2)
+  }], "a0 1"];
+  M._.w()
+</script>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/sizes.json
new file mode 100644
index 00000000000..946b30e8ffc
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/sizes.json
@@ -0,0 +1,18 @@
+{
+  "dom": {
+    "template.marko.page.mjs": {
+      "total": {
+        "min": 13808,
+        "brotli": 5279
+      },
+      "files": {
+        "tags/panel.marko": 254,
+        "template.marko": 541
+      }
+    }
+  },
+  "html": {
+    "min": 503,
+    "brotli": 321
+  }
+}
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/tags/panel.marko b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/tags/panel.marko
new file mode 100644
index 00000000000..089c32a5b56
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/tags/panel.marko
@@ -0,0 +1,2 @@
+<define/section><span>${input.label}</span></define>
+<return={ section }/>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/template.marko b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/template.marko
new file mode 100644
index 00000000000..27a106e090a
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/template.marko
@@ -0,0 +1,5 @@
+<let/idx=0/>
+<panel/a label="alpha"/>
+<panel/b label="beta"/>
+<div><${(idx ? b : a).section}/></div>
+<button onClick() { idx = 1 - idx }>swap</button>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/test.ts b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/test.ts
new file mode 100644
index 00000000000..524f9249286
--- /dev/null
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-content-instance-swap/test.ts
@@ -0,0 +1,9 @@
+import type { TestConfig } from "../../main.test";
+
+function swap(container: Element) {
+  container.querySelector(`button`)!.click();
+}
+
+export const config: TestConfig = {
+  steps: [{}, swap, swap],
+};
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-native/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-native/sizes.json
index 8225a1fd267..70e193ec185 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-native/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-native/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 14004,
-        "brotli": 5356
+        "min": 14102,
+        "brotli": 5391
       },
       "files": {
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-tags/sizes.json
index 42974174e48..1e23abb0fdf 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-custom-tags/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 14236,
-        "brotli": 5419
+        "min": 14334,
+        "brotli": 5461
       },
       "files": {
         "tags/child1.marko": 364,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-input-intersection/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-input-intersection/sizes.json
index 9fd8a37ce70..f03ffa62d3d 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-input-intersection/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-input-intersection/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13358,
-        "brotli": 5110
+        "min": 13456,
+        "brotli": 5148
       },
       "files": {
         "tags/my-tag.marko": 509,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-resume-owns-branch-cleanup/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-resume-owns-branch-cleanup/sizes.json
index e9908e9e304..5ebeb210273 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-resume-owns-branch-cleanup/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-resume-owns-branch-cleanup/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13897,
-        "brotli": 5324
+        "min": 13995,
+        "brotli": 5358
       },
       "files": {
         "tags/child.marko": 393,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-single-arg/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-single-arg/sizes.json
index 7db9d141d7a..0751e7f6fce 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-single-arg/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-single-arg/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 14026,
-        "brotli": 5352
+        "min": 14124,
+        "brotli": 5377
       },
       "files": {
         "tags/custom-tag.marko": 314,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-sometimes-null/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-sometimes-null/sizes.json
index 35f3984688f..1334bf5f473 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-sometimes-null/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-sometimes-null/sizes.json
@@ -1,8 +1,8 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13185,
-      "brotli": 5028
+      "min": 13283,
+      "brotli": 5075
     }
   },
   "html": {
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.debug.html
index b017ed76f64..ec1cfed191d 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.debug.html
@@ -13,7 +13,9 @@
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         "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/template.marko_0_setHtml/var"
         ),
-      "ConditionalRenderer:#text/0": "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/template.marko_1_content"
+      "ConditionalRenderer:#text/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/template.marko_1_content"
+        )
     }, {
       _: _(1)
     }],
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.html
index 63bf598f524..c8c4f3bbe10 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/__snapshots__/writes.html
@@ -9,7 +9,7 @@
     d: new Set([_(3)])
   }, {
     T: _(1, "a2"),
-    Da: "a0"
+    Da: _(1, "a0")
   }, {
     _: _(1)
   }], "a1 3"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/sizes.json
index a9723233477..057dffd0e88 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-var-in-body/sizes.json
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 450,
-    "brotli": 305
+    "min": 455,
+    "brotli": 307
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.debug.html
index 6ae3ec99351..8ca3a34e212 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.debug.html
@@ -7,7 +7,9 @@
       "ConditionalRenderer:#text/0": "div",
       tagName: "div"
     }, {
-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/template.marko_1_content"
+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/template.marko_1_content"
+        )
     }, 1, {
       count: 0,
       "#ClosestBranchId": 3
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.html
index d2895ad268a..fbdbf135cbe 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/__snapshots__/writes.html
@@ -7,7 +7,7 @@
     Da: "div",
     c: "div"
   }, {
-    Da: "a0"
+    Da: _(1, "a0")
   }, 1, {
     c: 0,
     G: 3
diff --git a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/sizes.json
index e0b30734a4b..5c82177fdbf 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/dynamic-tag-with-updating-body/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13446,
-        "brotli": 5123
+        "min": 13544,
+        "brotli": 5160
       },
       "files": {
         "tags/counter.marko": 389,
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 495,
-    "brotli": 317
+    "min": 500,
+    "brotli": 322
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/hoist-custom-tag-var-from-dynamic/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/hoist-custom-tag-var-from-dynamic/sizes.json
index 0123bc46b8a..eb3a7312301 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/hoist-custom-tag-var-from-dynamic/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/hoist-custom-tag-var-from-dynamic/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13829,
-        "brotli": 5270
+        "min": 13927,
+        "brotli": 5307
       },
       "files": {
         "tags/thing.marko": 360,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/hoist-dynamic-tag-var-from-dynamic/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/hoist-dynamic-tag-var-from-dynamic/sizes.json
index c2c7116a6f4..85e8f43d972 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/hoist-dynamic-tag-var-from-dynamic/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/hoist-dynamic-tag-var-from-dynamic/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 14560,
-        "brotli": 5540
+        "min": 14658,
+        "brotli": 5576
       },
       "files": {
         "tags/child.marko": 349,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/hoist-native-tag-var-from-dynamic/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/hoist-native-tag-var-from-dynamic/sizes.json
index 0572025d862..4b4c1fe2f07 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/hoist-native-tag-var-from-dynamic/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/hoist-native-tag-var-from-dynamic/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 13639,
-        "brotli": 5191
+        "min": 13737,
+        "brotli": 5224
       },
       "files": {
         "tags/child.marko": 356,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.debug.html
index 129a88a23e1..908b1c63f58 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.debug.html
@@ -17,11 +17,17 @@
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       Child: "a"
     }, {
-      "ConditionalRenderer:#a/0": "packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/template.marko_2_content"
+      "ConditionalRenderer:#a/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/template.marko_2_content"
+        )
     }, 1, {
-      "ConditionalRenderer:#a/0": "packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/template.marko_3_content"
+      "ConditionalRenderer:#a/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/template.marko_3_content"
+        )
     }, 1, {
-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/template.marko_1_content"
+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/template.marko_1_content"
+        )
     }, {
       _: _(1)
     }],
diff --git a/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.html
index b28c7dfe41e..2b42e89509e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/__snapshots__/writes.html
@@ -16,11 +16,11 @@
     l: "div",
     m: "a"
   }, {
-    Da: "a0"
+    Da: _(1, "a0")
   }, 1, {
-    Da: "a1"
+    Da: _(1, "a1")
   }, 1, {
-    Da: "a2"
+    Da: _(1, "a2")
   }, {
     _: _(1)
   }], "a3 1 a4 1"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/sizes.json
index 2e036dd7074..0dfd48d9cda 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/namespaced-tags/sizes.json
@@ -1,12 +1,12 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13993,
-      "brotli": 5332
+      "min": 14091,
+      "brotli": 5364
     }
   },
   "html": {
-    "min": 797,
-    "brotli": 419
+    "min": 812,
+    "brotli": 423
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.debug.html
index 337af399df9..96b96fbd316 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.debug.html
@@ -7,7 +7,9 @@
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     }, 1, {
       "BranchScopes:#div/0": _(4),
-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/template.marko_3_content"
+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/template.marko_3_content"
+        )
     }],
     "packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/template.marko_2_item 3 packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/template.marko_0 1"
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.html
index 5c0a2a0cd45..a4cecfdae40 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/__snapshots__/writes.html
@@ -7,7 +7,7 @@
     a: _(2)
   }, 1, {
     Aa: _(4),
-    Da: "a2"
+    Da: _(1, "a2")
   }], "a0 3 a3 1"];
   M._.w()
 </script>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/sizes.json
index 231264ab48b..5d3f023e35c 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-local-closures/sizes.json
@@ -1,12 +1,12 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 14551,
-      "brotli": 5637
+      "min": 14661,
+      "brotli": 5657
     }
   },
   "html": {
-    "min": 426,
-    "brotli": 291
+    "min": 431,
+    "brotli": 295
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.debug.html
index febd74d5b85..1b4d6978c45 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.debug.html
@@ -4,12 +4,12 @@
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   M._.r = [_ => [2, {
       "BranchScopes:#div/0": _(3),
-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/template.marko_1_content",
+      "ConditionalRenderer:#div/0": _.a = _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/template.marko_1_content"
+        ),
       input_head: {
         class: "h",
-        content: _(1,
-          "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/template.marko_1_content"
-          ),
+        content: _.a,
         *[Symbol.iterator]() {
           yield this
         }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.html
index 81f639aad9b..e3a6a863893 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/__snapshots__/writes.html
@@ -4,10 +4,10 @@
   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
     Aa: _(3),
-    Da: "a0",
+    Da: _.a = _(1, "a0"),
     e: {
       class: "h",
-      content: _(1, "a0"),
+      content: _.a,
       *[Symbol.iterator]() {
         yield this
       }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/sizes.json
index 680bf1ff002..6ccf492f265 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-attr-tag-also-custom/sizes.json
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 449,
-    "brotli": 307
+    "min": 452,
+    "brotli": 309
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.debug.html
index 6f5de3e5b77..51313d8fe7c 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.debug.html
@@ -4,12 +4,12 @@
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       "BranchScopes:#div/0": _(3),
-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/template.marko_1_content",
+      "ConditionalRenderer:#div/0": _.a = _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/template.marko_1_content"
+        ),
       input: {
         class: "x",
-        content: _(1,
-          "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/template.marko_1_content"
-          )
+        content: _.a
       }
     }],
     "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/tags/my-box.marko_0_input 2"
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.html
index 024abb7676e..f200ef97c0c 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/__snapshots__/writes.html
@@ -4,10 +4,10 @@
   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
     Aa: _(3),
-    Da: "a0",
+    Da: _.a = _(1, "a0"),
     d: {
       class: "x",
-      content: _(1, "a0")
+      content: _.a
     }
   }], "c0 2"];
   M._.w()
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/sizes.json
index 8243d2ca6f2..39d108b3401 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-also-custom/sizes.json
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 416,
-    "brotli": 287
+    "min": 419,
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/__snapshots__/writes.debug.html
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-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/template.marko_1_content",
+      "ConditionalRenderer:#div/0": _.a = _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/template.marko_1_content"
+        ),
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-        content: _.a = _(1,
-          "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/template.marko_1_content"
-          )
+        content: _.a
       },
       input_content: _.a
     }],
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/__snapshots__/writes.html
index 27237ded10a..6ac31f13a7b 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/__snapshots__/writes.html
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@@ -5,10 +5,10 @@
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   M._.r = [_ => [2, {
     Aa: _(3),
-    Da: "a0",
+    Da: _.a = _(1, "a0"),
     e: {
       class: "x",
-      content: _.a = _(1, "a0")
+      content: _.a
     },
     f: _.a
   }], "b0 2 b1 2"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/sizes.json
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--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-handler-read/sizes.json
@@ -12,7 +12,7 @@
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   "html": {
-    "min": 506,
-    "brotli": 324
+    "min": 505,
+    "brotli": 318
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/__snapshots__/writes.debug.html
index 9bb4a3f3461..e55f2a51888 100644
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+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/__snapshots__/writes.debug.html
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-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/template.marko_1_content",
+      "ConditionalRenderer:#div/0": _.a = _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/template.marko_1_content"
+        ),
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-        content: _(1,
-          "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/template.marko_1_content"
-          )
+        content: _.a
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       show: !1
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index 0dff135d910..179cd8f8662 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/__snapshots__/writes.html
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@@ -5,10 +5,10 @@
   WALKER_RUNTIME("M")("_");
   M._.r = [_ => [2, {
     Aa: _(3),
-    Da: "a0",
+    Da: _.a = _(1, "a0"),
     e: {
       class: "x",
-      content: _(1, "a0")
+      content: _.a
     },
     f: !1
   }], "b0 2 b1 2"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/sizes.json
index ab4c78490bf..f709f395f61 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content-opaque/sizes.json
@@ -2,8 +2,8 @@
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     "template.marko.page.mjs": {
       "total": {
-        "min": 13625,
-        "brotli": 5222
+        "min": 13723,
+        "brotli": 5254
       },
       "files": {
         "tags/render-input.marko": 289,
@@ -13,7 +13,7 @@
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   "html": {
-    "min": 512,
+    "min": 515,
     "brotli": 321
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/__snapshots__/writes.debug.html
index fdcad2d2ada..981c4f57d11 100644
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+      "ConditionalRenderer:#strong/4": _.b = _(2,
+        "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/tags/my-div.marko_1_content"
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-      CustomContent_content: _(2,
-        "packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/tags/my-div.marko_1_content"
-        )
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/__snapshots__/writes.html
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@@ -10,10 +10,10 @@
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     Db: "a0",
     Ae: _(6),
-    De: "b0",
+    De: _.a = _(2, "b0"),
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-    k: _(2, "b0")
+    k: _.a
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/sizes.json
index 6686f3e73e0..ef24a31607d 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/native-tag-spread-content/sizes.json
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-    "min": 613,
-    "brotli": 353
+    "min": 616,
+    "brotli": 362
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.debug.html
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--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.debug.html
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-      "ConditionalRenderer:#option/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/template.marko_1_content"
+      "ConditionalRenderer:#option/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/template.marko_1_content"
+        )
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       "BranchScopes:#option/0": _(7),
-      "ConditionalRenderer:#option/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/template.marko_2_content"
+      "ConditionalRenderer:#option/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/template.marko_2_content"
+        )
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       "BranchScopes:#option/0": _(9),
-      "ConditionalRenderer:#option/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/template.marko_3_content"
+      "ConditionalRenderer:#option/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/template.marko_3_content"
+        )
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.html
index 941078375b6..cdfb93a008b 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/__snapshots__/writes.html
@@ -7,13 +7,13 @@
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   M._.r = [_ => [4, {
     Aa: _(5),
-    Da: "a0"
+    Da: _(1, "a0")
   }, 1, {
     Aa: _(7),
-    Da: "a1"
+    Da: _(1, "a1")
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-    Da: "a2"
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/sizes.json
index 40536d4da17..752fd570124 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-custom-tag/sizes.json
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 516,
-    "brotli": 304
+    "min": 531,
+    "brotli": 307
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.debug.html
index d9031ad6d64..13ce324519e 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.debug.html
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-      "ConditionalRenderer:#option/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_4_content"
+      "ConditionalRenderer:#option/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_4_content"
+        )
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       "BranchScopes:#option/0": _(7),
-      "ConditionalRenderer:#option/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_5_content"
+      "ConditionalRenderer:#option/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_5_content"
+        )
     }, 1, {
       "BranchScopes:#option/0": _(9),
-      "ConditionalRenderer:#option/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_6_content"
+      "ConditionalRenderer:#option/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_6_content"
+        )
     }],
     "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/template.marko_3_option 4 6 8"
   ];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.html
index d912270b0e8..b0beee96525 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/__snapshots__/writes.html
@@ -7,13 +7,13 @@
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   M._.r = [_ => [4, {
     Aa: _(5),
-    Da: "a3"
+    Da: _(1, "a3")
   }, 1, {
     Aa: _(7),
-    Da: "a4"
+    Da: _(1, "a4")
   }, 1, {
     Aa: _(9),
-    Da: "a5"
+    Da: _(1, "a5")
   }], "a0 4 6 8"];
   M._.w()
 </script>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/sizes.json
index 5fde7e3fb1c..ae20466c451 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-attr-tag-define-tag/sizes.json
@@ -6,7 +6,7 @@
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   "html": {
-    "min": 516,
-    "brotli": 304
+    "min": 531,
+    "brotli": 306
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.debug.html
index d0085ef1037..d6b65addc39 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.debug.html
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-      "ConditionalRenderer:#p/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/template.marko_1_content",
+      "ConditionalRenderer:#p/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/template.marko_1_content"
+        ),
       input_class: "foo"
     }, 2, {
       "BranchScopes:#p/0": _(13),
-      "ConditionalRenderer:#p/0": "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/template.marko_2_content",
+      "ConditionalRenderer:#p/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/template.marko_2_content"
+        ),
       input_class: "bar"
     }],
     "packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/tags/child.marko_0_input_class_rest 3 6 9 12"
diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.html
index 0357dbccb37..05fc5a2bed7 100644
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+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/__snapshots__/writes.html
@@ -18,11 +18,11 @@
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     Aa: _(10),
-    Da: "a0",
+    Da: _(1, "a0"),
     d: "foo"
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     Aa: _(13),
-    Da: "a1",
+    Da: _(1, "a1"),
     d: "bar"
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/sizes.json
index 19ece57d6fc..4f5b6f02029 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-content-rest/sizes.json
@@ -12,7 +12,7 @@
     }
   },
   "html": {
-    "min": 642,
-    "brotli": 337
+    "min": 652,
+    "brotli": 338
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-rest-input-with-attr-tags-deopt/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-rest-input-with-attr-tags-deopt/sizes.json
index 9a076f494cf..b5d81a64484 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-rest-input-with-attr-tags-deopt/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/spread-to-known-rest-input-with-attr-tags-deopt/sizes.json
@@ -2,8 +2,8 @@
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     "template.marko.page.mjs": {
       "total": {
-        "min": 14704,
-        "brotli": 5757
+        "min": 14802,
+        "brotli": 5776
       },
       "files": {
         "tags/child.marko": 759,
diff --git a/packages/runtime-tags/src/__tests__/fixtures/static-content-conditional-consumer/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/static-content-conditional-consumer/sizes.json
index 2ef12f4766f..fab208b5592 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/static-content-conditional-consumer/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/static-content-conditional-consumer/sizes.json
@@ -2,8 +2,8 @@
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-        "min": 13531,
-        "brotli": 5172
+        "min": 13629,
+        "brotli": 5207
       },
       "files": {
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+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/template.marko_1_content"
+        )
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-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/template.marko_2_content"
+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/template.marko_2_content"
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-      "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/template.marko_4_content"
+      "ConditionalRenderer:#div/0": _(1,
+        "packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/template.marko_4_content"
+        )
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diff --git a/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/__snapshots__/writes.html
index fae7f49040c..2cc957375fd 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/__snapshots__/writes.html
@@ -14,11 +14,11 @@
     Dg: "b",
     h: !0
   }, {
-    Da: "a0"
+    Da: _(1, "a0")
   }, 1, {
-    Da: "a1"
+    Da: _(1, "a1")
   }, 3, {
-    Da: "a3"
+    Da: _(1, "a3")
   }], "a4 1"];
   M._.w()
 </script>
diff --git a/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/sizes.json
index 9b7c5c06003..93f7543c8bf 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/tag-name-type-unions/sizes.json
@@ -2,8 +2,8 @@
   "dom": {
     "template.marko.page.mjs": {
       "total": {
-        "min": 14410,
-        "brotli": 5482
+        "min": 14508,
+        "brotli": 5513
       },
       "files": {
         "tags/a/index.marko": 374,
@@ -13,7 +13,7 @@
     }
   },
   "html": {
-    "min": 706,
-    "brotli": 383
+    "min": 721,
+    "brotli": 387
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.debug.html
index 61f141297d1..e681c1b354a 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.debug.html
@@ -6,10 +6,10 @@
       a: "abc",
       "#childScope/1": _(2)
     }, {
-      "ConditionalRenderer:#text/0": "packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/template.marko_1_content",
-      input_content: _(1,
+      "ConditionalRenderer:#text/0": _.a = _(1,
         "packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/template.marko_1_content"
-        )
+        ),
+      input_content: _.a
     }, {
       _: _(1)
     }],
diff --git a/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.html
index 0a26209a684..a9f9dffe0e6 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/__snapshots__/writes.html
@@ -6,8 +6,8 @@
     d: "abc",
     b: _(2)
   }, {
-    Da: "a1",
-    d: _(1, "a1")
+    Da: _.a = _(1, "a1"),
+    d: _.a
   }, {
     _: _(1)
   }], "a2 1"];
diff --git a/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/sizes.json
index f5bc591d467..41bd09935db 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/tag-param-if-closure/sizes.json
@@ -1,12 +1,12 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13885,
-      "brotli": 5325
+      "min": 13983,
+      "brotli": 5362
     }
   },
   "html": {
-    "min": 431,
-    "brotli": 295
+    "min": 434,
+    "brotli": 300
   }
 }
diff --git a/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.debug.html b/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.debug.html
index 355c8c905e8..ccf8cedea92 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.debug.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.debug.html
@@ -7,7 +7,7 @@
   }, {
     "ConditionalRenderer:#text/0": "div",
     as: "div",
-    content: _(1,
+    content: _.a = _(1,
       "packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/template.marko_3_content"
       )
   }, {
@@ -16,7 +16,7 @@
         "packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/template.marko_0/onClick"
         )
     },
-    "ConditionalRenderer:#div/0": "packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/template.marko_3_content",
+    "ConditionalRenderer:#div/0": _.a,
     "#Renderer": "div"
   }], "_dynamicTagScript 3"];
   M._.w()
diff --git a/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.html b/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.html
index 9bfec52510c..89eb1e07041 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.html
+++ b/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/__snapshots__/writes.html
@@ -7,12 +7,12 @@
   }, {
     Da: "div",
     d: "div",
-    f: _(1, "a3")
+    f: _.a = _(1, "a3")
   }, {
     Ia: {
       click: _(1, "a0")
     },
-    Da: "a3",
+    Da: _.a,
     R: "div"
   }], "d 3"];
   M._.w()
diff --git a/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/sizes.json b/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/sizes.json
index ca73c5f957f..1128970c4c4 100644
--- a/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/sizes.json
+++ b/packages/runtime-tags/src/__tests__/fixtures/unused-dynamic-tag-body-serialize-reason/sizes.json
@@ -1,12 +1,12 @@
 {
   "dom": {
     "template.marko.page.mjs": {
-      "min": 13646,
-      "brotli": 5238
+      "min": 13744,
+      "brotli": 5271
     }
   },
   "html": {
-    "min": 445,
-    "brotli": 302
+    "min": 448,
+    "brotli": 308
   }
 }
diff --git a/packages/runtime-tags/src/dom/control-flow.ts b/packages/runtime-tags/src/dom/control-flow.ts
index f93c290adee..a19038fcc2a 100644
--- a/packages/runtime-tags/src/dom/control-flow.ts
+++ b/packages/runtime-tags/src/dom/control-flow.ts
@@ -530,10 +530,7 @@ export let _dynamic_tag = function dynamicTag(
   return (scope, newRenderer, getInput?: () => any) => {
     const normalizedRenderer = normalizeDynamicRenderer<Renderer>(newRenderer);
     if (
-      scope[rendererAccessor] !==
-        (scope[rendererAccessor] =
-          (normalizedRenderer as Renderer | undefined)?.[RendererProp.Id] ||
-          normalizedRenderer) ||
+      rendererChanged(scope, rendererAccessor, normalizedRenderer) ||
       (getContent && !(normalizedRenderer || scope[childScopeAccessor]))
     ) {
       setConditionalRenderer(
@@ -631,6 +628,26 @@ export let _dynamic_tag = function dynamicTag(
   };
 };
 
+// The renderer id is shared by every instance of a content section, so a
+// renderer only counts as unchanged when its owner scope also matches;
+// bare string slots (tag names, resumed unregistered ids) have no owner.
+export function rendererChanged(
+  scope: Scope,
+  rendererAccessor: string,
+  renderer: Renderer | string | undefined,
+) {
+  const prev = scope[rendererAccessor] as Renderer | string | undefined;
+  const changed =
+    ((prev as Renderer | undefined)?.[RendererProp.Id] || prev) !==
+      ((renderer as Renderer | undefined)?.[RendererProp.Id] || renderer) ||
+    (typeof prev !== "string" &&
+      typeof renderer !== "string" &&
+      (prev as Renderer | undefined)?.[RendererProp.Owner] !==
+        (renderer as Renderer | undefined)?.[RendererProp.Owner]);
+  scope[rendererAccessor] = renderer;
+  return changed;
+}
+
 // Specialized `_dynamic_tag` for a content passthrough. The caller guarantees a
 // normalized content `Renderer` (or undefined) rendered with no input or
 // parameters.
@@ -642,10 +659,7 @@ export function _dynamic_tag_content(
   const rendererAccessor = AccessorPrefix.ConditionalRenderer + nodeAccessor;
   enableBranches();
   return (scope, renderer) => {
-    if (
-      scope[rendererAccessor] !==
-      (scope[rendererAccessor] = renderer?.[RendererProp.Id] || renderer)
-    ) {
+    if (rendererChanged(scope, rendererAccessor, renderer)) {
       setConditionalRenderer(
         scope,
         nodeAccessor as string,
diff --git a/packages/runtime-tags/src/dom/dom.ts b/packages/runtime-tags/src/dom/dom.ts
index 69a5ea8192e..242db558595 100644
--- a/packages/runtime-tags/src/dom/dom.ts
+++ b/packages/runtime-tags/src/dom/dom.ts
@@ -23,7 +23,7 @@ import {
   type Scope,
 } from "../common/types";
 import { $signal } from "./abort-signal";
-import { setConditionalRenderer } from "./control-flow";
+import { rendererChanged, setConditionalRenderer } from "./control-flow";
 import {
   _attr_details_or_dialog_open,
   _attr_details_or_dialog_open_script,
@@ -367,9 +367,11 @@ export function _attr_content(
 ) {
   const content = normalizeClientRender(value);
   if (
-    scope[AccessorPrefix.ConditionalRenderer + nodeAccessor] !==
-    (scope[AccessorPrefix.ConditionalRenderer + nodeAccessor] =
-      content?.[RendererProp.Id])
+    rendererChanged(
+      scope,
+      AccessorPrefix.ConditionalRenderer + nodeAccessor,
+      content,
+    )
   ) {
     setConditionalRenderer(scope, nodeAccessor, content, createAndSetupBranch);
     if (content?.[RendererProp.Accessor]) {
diff --git a/packages/runtime-tags/src/html/dynamic-tag.ts b/packages/runtime-tags/src/html/dynamic-tag.ts
index 7b970d08b43..3aafd840df6 100644
--- a/packages/runtime-tags/src/html/dynamic-tag.ts
+++ b/packages/runtime-tags/src/html/dynamic-tag.ts
@@ -9,6 +9,7 @@ import {
   ResumeSymbol,
 } from "../common/types";
 import { _attr_select_value, _attr_textarea_value, _attrs } from "./attrs";
+import { getRegistered } from "./serializer";
 import type { ServerRenderer } from "./template";
 import {
   _html,
@@ -186,9 +187,16 @@ export let _dynamic_tag = (
   if (rendered) {
     if (shouldResume) {
       _scope(scopeId, {
+        // A renderer registered with a scope resumes as the owned client
+        // renderer so instances of the same content stay distinguishable;
+        // otherwise the bare id matches any instance-less renderer.
         [AccessorPrefix.ConditionalRenderer + accessor]:
-          (renderer as ServerRenderer | undefined)?.[RendererProp.Id] ||
-          renderer,
+          renderer &&
+          typeof renderer !== "string" &&
+          getRegistered(renderer)?.scope
+            ? renderer
+            : (renderer as ServerRenderer | undefined)?.[RendererProp.Id] ||
+              renderer,
       });
     }
   } else {
diff --git a/packages/runtime-tags/src/html/writer.ts b/packages/runtime-tags/src/html/writer.ts
index 8ffa2c00787..0b22c6805a5 100644
--- a/packages/runtime-tags/src/html/writer.ts
+++ b/packages/runtime-tags/src/html/writer.ts
@@ -23,6 +23,7 @@ import {
   WALKER_RUNTIME_CODE,
 } from "./inlined-runtimes.debug";
 import {
+  getRegistered,
   K_SCOPE_ID,
   quote,
   register as serializerRegister,
@@ -146,8 +147,12 @@ export function _attr_content(
     if (shouldResume) {
       writeScope(scopeId, {
         [AccessorPrefix.BranchScopes + nodeAccessor]: writeScope(branchId, {}),
+        // A renderer registered with a scope resumes as the owned client
+        // renderer so instances of the same content stay distinguishable.
         [AccessorPrefix.ConditionalRenderer + nodeAccessor]:
-          render?.[RendererProp.Id],
+          render && getRegistered(render)?.scope
+            ? render
+            : render?.[RendererProp.Id],
       });
     }
   } else {