https://bugs.winehq.org/show_bug.cgi?id=52701
--- Comment #3 from freehand@tutanota.com --- This occluding box bug does not occur in Microsoft Windows. It appears to be related to the layout of the menu bars in the linux desktop. For example the occluding box has a different shape under ubuntu 21.10 (gnome desktop) than under xubuntu 21.10 (same, except using Xfce desktop).