Sounds like a graphics card/driver issue from that description. You mentioned it was intel - have you tried "forcing" the graphics to the dGPU if you have one? It's called "Automatic Graphics Switching" under "Options..." at the bottom of the Battery part of System Settings.
I doubt it is related to the DGPU on a laptop. It occurs for me on 7,1 with the W6800X MPX module. Resetting the cursor doesn't really work. It's better (ie, not a coloured box) but still not perfect.