[Bug 54007] New: in kde plasma fullscreen videogames cause gap between taskbar and bottom edge of the screen

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54007

Bug ID: 54007
           Summary: in kde plasma fullscreen videogames cause gap between
                    taskbar and bottom edge of the screen
           Product: Wine-staging
           Version: 7.22
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

Created attachment 73586
  --> https://bugs.winehq.org/attachment.cgi?id=73586
this is how it looks with and without launched game

characteristics:
Operating System: Nobara Linux 36
KDE Plasma Version: 5.26.3
KDE Frameworks Version: 5.100.0
Qt Version: 5.15.7
Kernel Version: 6.0.10-201.fc36.x86_64 (64-bit)
Graphics Platform: X11

how to reproduce:

1) launch some fullscreen videogame (personally i do it with lutris from
flathub, maybe its important)
2) alt+tab to another non-fullscreen window
3) put cursor in bottom edge of the screen
4) try to switch windows with mouse wheel
5) notice small (several pixels height) gap between bottom edge of the screen
and taskbar, and also between taskbar and current non-fullscreen window in
focus.
6) close fullscreen videogame
7) everything is normal, taskbar is adjacent to the bottom edge of the screen
without gaps

this started to happen after update to wine-7.22 (Staging), i've never seen
this before, so i assume this bug occurs in this particular version.