Graphical corruption in OpenBSD/X on VMWare - BSD

I can create garbage by making new windows or using menus. Usually dragging the window resolves the crap, but it's annoying it appears in the first place. Using wmx as my WM.
It's the graphic driver.
It happens to me with the xf86-video-intel 2.21.6-1, it didn't use to happen with the older versions.
It's not related to the WM.
This is in VMWare - it must be an X defect then.

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