[Bug 46166] New: Close button disappear after use load option (file dialog )

https://bugs.winehq.org/show_bug.cgi?id=46166

Bug ID: 46166
           Summary: Close button disappear after use load option (file
                    dialog)
           Product: Wine
           Version: 3.20
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 62810
  --> https://bugs.winehq.org/attachment.cgi?id=62810
Software installed

The software attached is a GUI for control a equipment (if need I can attache
the installation wizard/setup).
After I use the "load setup file" in the main windows (or any other) the close
and minimize button of the title windows disappear.
I am urnning at Wine 3.20 on Ubuntu 16.04.