Since update im experience a very short black flickering, even open kate or starting terminal, it shows a strange behavior.
After installing nvidia-settings (i have a 2080Ti) and after a restart it got it reduced a little.
But i just see it flickers again when i openend Steam or right now in Firefox, while i write this message.
EDIT:
I also created a Topic in this Forum and in the nvidia Forum:
EDIT2: Problem is solved, you can find the original answer from dbrhks in the nvidia Forum but @belyash created a little instruction that explains it better, in our Forum: