[Bug 43360] New: Wine staging 2.12, steam cant join mutiplayer friends

https://bugs.winehq.org/show_bug.cgi?id=43360

Bug ID: 43360
           Summary: Wine staging 2.12, steam cant join mutiplayer friends
           Product: Wine-staging
           Version: 2.12
          Hardware: x86-64
                OS: Mac OS X
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail]

There seems to be a problem when joining people in multiplayer matches. It will
say something like "Error. Failed to join game." Playing offline/ai works fine,
but trying to play with others don't work. Any clues?