[Bug 54775] New: alt-tab not working when playing osu!

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54775

Bug ID: 54775
           Summary: alt-tab not working when playing osu!
           Product: Wine
           Version: 8.5
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: winex11.drv
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 74266
  --> https://bugs.winehq.org/attachment.cgi?id=74266
logs from launching the game (until x11drv error)

Hello, ever since I updated Wine to 8.0-rc4 (and later versions, as this
happens for latest 8.5 staging too) I've had problems to alt-tab when playing
osu!, as the game would stay focused without having the possibility to switch
to other windows.

Logs show a certain error when alt-tabbing in x11drv, the exact logs are in the
file attached.
This doesn't happen with previous Wine vers. (ex. 7.16).

I've also tried other few games, and the same happens with osu!Lazer.exe too.
Note that this happens on X11 and Wayland too (with XWayland).

Steps to reproduce are:
- Set "Hide Wine Version" in winecfg (this allows proper fullscreen for osu!)
- Launch the game

Thanks in advance for the help!