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.
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-16496.
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