[Bug?] Broken Windows TaskBar context Menu for stack and side by side

Hello, I see a strange problem with Windows TaskBar context Menu for stack and side by side, since 20H2, when we press one of them there're seems a "Ghost Window" that cause us have additional window so there're empty space for it, which is odd, I don't get this problem on old windows version, 1903/1909 fine, as I've 20 computer on lab that have that.
So the question is, is there anyway to fix it? Thanks

My version is 20H2 19042.867, Just update yesterday, seen this problem since 20H1,
Any help appriciated. Thanks
No Other App running other than those that available on the screenshoot.