9/10 times when I try to open a world, it opens up and after placing around 10 blocks the app crashes, or I can't load the world at all and it will display a screen saying "name of a world" can't be opened. Also I just noticed that after crashing Minecraft resetted itself to basic settings, it changed my name back to "Steve" and it selected the default skin. Can anyone at Mojang help me, and is anyone experiencing the same problems as I am? Please let me know!

SYSTEM INFORMATION

iPad 4, iOS 9.2.4

Minecraft 0.13.2 ALPHA