Some Block Textures are Corrupted

I Was Playing version 0.15.0 with my sister and when she quit after a minute All Dirt and grass blocks were corrupted and they had a potion arrow of posie.. I DONT KNOW HOW TO SPEll ok any way also the haybales were courrupted and IT WAS WIRED this also affected my other worlds i had to restart my kindle fire hd 7 to fix the bug Ps im using a 2012 model