Geforce Experience or not?

So I’ve used GFE for years with no obvious issues, but after last driver update last week (and simultaneous Win11 patch) I started getting slight stutters every 10-20 seconds, very annoying.

I tried DX11, DX12, rollback of driver, no joy. Then I tried installing the latest driver again but without GFE……no stutter!

5800X3D 3080Ti Win11