[Bug 43030] New: LINE: Window border stays on top of other windows

https://bugs.winehq.org/show_bug.cgi?id=43030

Bug ID: 43030
           Summary: LINE: Window border stays on top of other windows
           Product: Wine
           Version: 2.3
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 58181
  --> https://bugs.winehq.org/attachment.cgi?id=58181
Screenshot of the behavior

This is using the windows version of LINE from here:
https://scdn.line-apps.com/client/win/new/LineInst.exe (App homepage:
https://line.me/)

The app seems to have a black border that follows the main window around. You
can see it if you move the window around as the border stays in place, and only
moves after the window finishes moving. This border stays on top of all other
windows.

This behaviour occurs in every window manager or DE that I have tried, so I do
not think it's window manager related.

I'm currently on wine-staging, but this has happened with multiple versions of
wine.