[Bug 53598] New: Wrong icons in MDI child menu title bar

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53598

Bug ID: 53598
           Summary: Wrong icons in MDI child menu title bar
           Product: Wine
           Version: 7.0
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: user32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

In Wine 7 MDI child windows show strange icons in their title bar (looking like
"0", "1" and some strange rectangular shape, respectively) instead of the
expected standard minimize/restore/close buttons.

This used to work in Wine 4 and possibly later, I could run git-bisect if
really necessary, but it's going to take some time to rebuild Wine ~15 times,
so maybe someone can see where does the problem come from without doing this?

Also, I don't provide a reproducer because I believe this affects any program
using MDI, but please let me know if one is needed (and in which form, source
or binary).