Weird chunks and bugs after a crash

There are some weird chunk errors in my world after my tablet crashed (the game itself didn't crash). Apparently when this happens, it starts to rain when I return to my world and when I explore a new set of Chunks, the ground is elevated exposing ore, underground lakes, and making the terrain higher. Also, when I first got back to the game after the crash, the last time played display is on 12/31/67 and the world name is gone as well as the seed being changed to 0. Please fix this issue, this wasn't the first time it happened to me.