[Bug 57111] New: Transparent menu backgrounds appear black in CEF sample application

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=57111

Bug ID: 57111
           Summary: Transparent menu backgrounds appear black in CEF
                    sample application
           Product: Wine
           Version: 9.16
          Hardware: x86-64
               URL: https://cef-builds.spotifycdn.com/cef_binary_127.3.5%2
                    Bg114ea2a%2Bchromium-127.0.6533.120_windows64_client.t
                    ar.bz2
                OS: Linux
            Status: NEW
          Keywords: download, source
          Severity: trivial
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Ubuntu

Created attachment 77000
  --> https://bugs.winehq.org/attachment.cgi?id=77000
Screencast

The menus on the Chromium Embedded Framework sample application have a black
background behind them. On Windows 10 these do not appear / are transparent.