Minecarts, fire, tnt, and lava and ice = lots of crashes

Device: Galaxy Note2 (sph-l900 sprint, stock firmware)

Igniting TNT next to a mine cart = crash/hang regardless of whether the cart is on a track or not.

Pushing a minecart off of a track onto a block that is on fire (netherrack) also results in a crash/hang.

Pouring lava from a lava bucket onto ice will seem to work fine for a few moments until the ice starts to melt, then the game freezes.

Upon restart, the map rolls back prior to fire/igniting tnt/placing lava.

sometimes the crafting/inventory ui foreground (blocks/tools) shows up but the background doesn't