Hi
I used to play MTGA in Android 11, throught Samsung S10 (Latin America version, with Exynos).
Lot of times the game simple closed in the middle of the battle, on sideboarding or waiting room.
In my phone, there is a configuration that saves batteries, normal in most of devices. In particular there was an option that limitated my CPU to max 70% of capacity...
So I cut this config and let the CPU free to process...
The game don't get closed anymore in the middle of the gameplay...has been 5 days and no crash!
So, maybe your development team could take a look or at least inform the user's about this config restriction.