User input does not work well on mobile

Seems like on Firefox on iOS, I must scroll through the list of users in order to select a speaker. I cannot get the keyboard to pop up, so I can't search.

![image](https://user-images.githubusercontent.com/42927786/180626463-da1d7b08-8781-4958-886a-9a1894dbaf13.png)

Not sure if this is a bug with my browser or a bug with the app, but maybe there's a better way to do this on mobile?