Issue description in a single screenshot:
Just set my 16x16 bitmap 16px.bmp as desktop wallpaper, and move windows / pop up menus / anything else to reproduce this issue.
- Bug does not depend on screen resolution / bit depth
- Not depend on wallpaper bit depth
- Does not matter whether explorer.exe is running or not
Also see a video: ReactOS-2019-03-08T16-09-14-829101500Z.webm