Hello. The latest update for Android has introduced a bug when playing games. So, initially the box that shows that the shaders are loading will pop up mid game and stay in the middle of the screen until you restart yuzu. Also, games are crashing quite frequently after this latest update. I got done playing Super Mario 3D World a while ago because of the loading box big and I tried restarting the game and it took over 5 times to get it running again.
In order for us to provide better support, we need to see the log generated by yuzu. This guide will walk you through how you can obtain the log file: Getting Log Files - yuzu