App goes to black screen on reboot (Android)

I’ve been testing a game of mine on android, and I have the occasional problem of a black screen that can only be fixed by force stopping the app and restarting. It never happens on the original bootup, only if you play, then close, then open back up. Even then it only happens probably 5% of the time. Any idea of what could be causing this?

I’ve been seen something very similar. For me it seems to happen after the I close the app and let the phone idle for several minutes. Were you able to figure anything out?