When saving after 10 min, Crash!

When I play Minecraft pe about 10 to 20 minutes on my OnePlus 3t the game crashes when I try to save! Everything will be lost what you build in this time! That sucks...

My friends do have the problem to! After a little bit of research I found out that it the Android version could be a problem because my friends have the same version.

Please fix it! It really sucks!
MfG
Magmaschleim