Yes, I got this problem yesterday on GeForce 6150 and the latest nvidia driver from repo. This computer was running Gnome and Cinnamon. It’s also on a kvm switch, which surely doesn’t help. No solution. I had to reboot it. 
In similar situations - under Unix - I used to disable the hardware cursor. It used to help with nv, but should also work with nvidia. At least the option exists.
Option "HWCursor" "off"
I haven’t tried yet. I might if the problem persists.