A little update:
After crashing, my XBOX game (World Planet Online) reacted sluggish. Even after reboot. On the Adrenalin performance screen it did not do a thing, when i fuddle it around maximize it, rescale it, scroll through it. As if there was no GPU usage at all. In Windows Task manager it did not show any stress on the GPU.
Reversing to 20.4.2 showed a huge performance boost in the game. And it reacted like before.