Tried all work arounds from Big Sur Flicker. I was previously working under that one but then saw a video of what was meant by flicker. Mine is a slow flicker like windows is trying to constantly redraw because of a change in resolution. Latest version latest VM hardware. Today it stopped flickering logged my out of the windows CM and decided to stick with XGA on a 4K monitor. So Restarting the VM. Only time I have seen this kind of behaviour was in Fusion and I believe it ended up being a memory leak.