[Bug 54050] New: X11, 10-bit color: Battle.net launcher windows or parts thereof aren't rendered

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54050

Bug ID: 54050
           Summary: X11, 10-bit color: Battle.net launcher windows or
                    parts thereof aren't rendered
           Product: Wine
           Version: 7.22
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

When running X.Org with 10-bit color depth (`DefaultDepth 30`), the Battle.net
launcher main window doesn't render correctly. The login window is partially
rendered, similar to the following screenshot: https://i.imgur.com/hA6XvxR.png

Hovering over the black rectangle, the cursor will change to a hand when placed
over what I assume are invisible button/link elements.

I believe the parts of the UI not working use the Chromium Embedded Framework.

Disabling 'Use browser hardware acceleration' has no effect.

The notification area icon menu works, as does the settings window and games
themselves.