Ran into this as well, twiddled a bit with resetting my graphical settings to default and adjusting stuff one by one with checking for the bug in between, and it seemed to go away. Unfortunately I didn't make a note of which settings seemed to be causing the problem.
It appears to go away if you just relaunch, but without setting changes comes back after a bit. I also upped my fan speed in the middle all this, so overheating might also be something to check. Best of luck!