Performance on Android/Emulators is still atrocious since Nov 17th patch

One issue that has been reported with some android phones (including both of mine) is that if you play the game, turn off the screen for a long while and go back to the phone, the game is locked up X amount of time. The music will still play though so the game isn't frozen.

After a min plus of waiting, it will either unfreeze or you will have to restart the game.