I have a ThinkPad X1 Extreme Gen 2 with NVIDIA GeForce GTX 1650 dGPU. When I run the laptop under Nvidia only mode, Chromium, Chrome and Brave all have blank or tearing windows after waking from sleep. I have to exit and relaunch the apps to get them back to normal.
This doesn’t happen in KDE. It seems to be specific to GDM and chromium based apps.