Closing game suddenly

Hi.

I installed recently version beta 1.16.20.52.

Before it i had 1.14.30 and it worked truly...

After i installed beta and play sometime (not depend on duration of game time: for ex one time after 1-2 hours after start game and one time in first...) Game close and aften my villagers disappear. One time my bow lost in inventory.

Idk how fix it. One time i delete folder completely and install again and it worked good but after 3-4 hours it again started crashing. My android phone is xiaomi not 8 pro. Memory and other game need to running properly is are free...

Hmm i think explain all. Pls help me to fix it.