[Bug 56388] New: Regression: Fullscreen apps show on wrong monitor and don't respond to mouse events properly

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56388

Bug ID: 56388
           Summary: Regression: Fullscreen apps show on wrong monitor and
                    don't respond to mouse events properly
           Product: Wine
           Version: 9.0
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 76135
  --> https://bugs.winehq.org/attachment.cgi?id=76135
Video showing the bug.

I don't have anything more to say. Using Steam Proton 9.0 to run a fullscreen
app doesn't open it on the default screen for some reason. Though, the mouse
works perfectly fine.  Trying to fullscreen it on the right screen, I can't use
mouse properly... In this case,it seems that only the left section is really
working. Probably since I have a 1080p main screen and a 768p secondary display
on the left, thinking it's 1080p fullscreen on the left 768p screen? It's realy
weird.

In the video, i go, starting fullscreen on the main screen:
Windowed
Go on the left display (notice the change in size)
Go back to the main display

This is really frustrating...