Not exactly the same, but here is Firefox doing something similar. The left bar is flickering between desktop wallpaper and the middle bar is a stretch of whatever is on the application and the rest is as it’s supposed to be. It seems to be related to the HZ as my video camera cannot capture the flicker, having an effect like what happens when a spinning blade will look like it’s not moving.
In games it’s usually top right/left square (about 30% width, 20% height) that starts flickering. Either way, there’s no need to take time to find a solution, since I’m already transfering things over. The firefox one to my understanding has been documented and common.