This is essentially a follow-up to someone else’s question about Vsync and tearing here.
I had the same problem with nvidia-driver-595 and I finally switched from it to the open source nouveau driver.
Problem solved!
I’m pretty sure I had no problem with an earlier version of the proprietary driver, so let’s hope that NVIDIA fix whatever they broke.
Anyway, hope that helps someone else running NVIDIA hardware, cheers.