I cannot gid rid of that problem despite of all the recent updates. Using an Apple Pro Display XDR with iMac Pro. Other than Apple's stuff, i jave One Drive, SnagIt and Avg on the bar. I have Cinch and HyperDock running in the background too. When I use the BlackMagic EGpu this problem goes away but after a while, the videos running on the monitor become "VHS" like and I have to restart the iMac. Very annoying. Hope they fix this issue soon.