I have a been experiencing screen flickering on my secondary display after updating to Nvidia driver version 535.86.05.
The last driver version I did not experience this on was 530.41.03.
It’s important to note that I have two G-Sync enabled displays. I recall another similar issue happening on Windows 11 with a previous driver version. In that case, a special patch was made to address the issue.
LG UltraGear - 27GL850-B (x2, G-Sync Enabled)
NixOS 23.05 (x86_64-linux)