On 29 October at 19:55:38 CET I finished a match and was automatically placed in an empty lobby (even I was not visible in it). The exit button did not work, so I restarded the game.
I've sent you a screenshot of this event.
I kind of remember a post by Monkeythumbz regarding a reboot of the servers, which may have happend during this time and which might have caused this. I cannot find this thread, though.