When creating a new world, everything plays just fine (survival). After 20 or so minutes of playing I would notice that the "server time" at the top of the screen would stop counting. any mobs nearby would stop moving and can no longer be damaged (there sounds still persist though). Also blocks no longer mine. after a few seconds of hitting the block it will just disappear.... No animation or anything it doesn't even drop anything (yes i mined with correct tools). Finally any items I drop disappear.

I will say i can place whatever blocks I happen to have in my inventory but the game doesn't seem to save. When i try to save and quit the game sits in the saving screen indefinitely, i have to quit the entire app and reload it. When I reload the game, i can mine for a good 30 seconds and so then everything goes back to being busted.