Minecraft stopped

I am using Phone ASUS Zenfone Go.

I am opening a chest.It opened it GUI and I use it.When I use it, suddenly It become black and It send me to dekstop.When I open my world back,my progress I done before are lost.

Normally, I would not exit the game.

What that happen was, it is closed.

The way to be like this is you need to play minecraft and use the chest multiple times.