Developed app in Mit app but running the after installation to phone having issues

Developed an app having multiple screens. After the game over it goes to one of the screen which have the display of score, one notifier.
After installing the app in phone the game over screen continuously flickers and takes time to stabilize and not allows to go back or close the application but the same is not so when we load through AI companion.

can some one please help in resolving the issue?

Since you are using multiple screens I believe you do not close them correctly and that causes the problem . See the proper way to do it


Also since you are using multiple screens check this post