SemiCircle chart flips

[NayanaRBhoj]

Hello,
i have implemented SemiCircle chart in my project,
i have a view pager in that a list of data when i come back to same page chart flips? what could be the issue? the issue mainly comes when while m on the activity and call comes or i navigate to some other via notifications or recent activities and then come back on the same activity, Semicircle chart flips