random crash after about 10 minutes

on a Samsung s7 edge, after both updates of android and mcpe earlier this month.

The game random crashes after about 10 minutes. in a Realm, in a local solo, even with just the game menu window opened. it doesn't matter what happen, it seems not linked to a particular event. The app is killed and the phone goes back to its menu.
I tried to reinstall minecraft, suppress other apps, restart the phone. Nothing works.