This game, Darius locked in. Immediately afterwards he left the chat room. I'm assuming that was his DC. He was DC'd when the game started and did not reconnect for the entirety of the game.
To be clear: I LIKE that the lobby does not automatically disband if you DC. I have had brief drops or DCs from pvp.net where my internet was fine, and I appreciated not having to remake the lobby like in normal TB.
If someone is DC'd when the game is attempting to start, wait 1 minute. If they do not connect, return everyone to the queue.