I was nearing the end of a game when it started stuttering and realized it was because an update was being downloaded. The game and Steam froze when it attempted to install. I had to kill steam from the command line but it showed no option to rejoin the match. IIRC this has been happening for the past few days, or at least the same symptoms. Screenshot is what it looked like before I killed it, neither were responsive.As an aside, I haven't completed a game at all today because either I disconnect or others do. Perhaps because of this?
