[Bug 42459] New: Bogus/ orphan small window sibling of Office 2007 applications

https://bugs.winehq.org/show_bug.cgi?id=42459

Bug ID: 42459
           Summary: Bogus/orphan small window sibling of Office 2007
                    applications
           Product: Wine
           Version: 2.1
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 57299
  --> https://bugs.winehq.org/attachment.cgi?id=57299
Excel orphan mini window

I can reproduce this reliably after working with Excel for a few minutes, and
the steps are essentially switching between Excel and other applications in
Ubuntu 16.04, using Alt+Tab and Alt+Esc. I don't have a precise repro sequence,
but try to Alt+Tab and Alt+Esc to/from Excel a bunch of time.

Attached are the results - the initial orphan window, and what happens when I
resize it (takes on the video memory behind).