My current 13-0 run just experienced its first loss due to endless turn. 3OoS deck with Cornicen (and friend), Grounded Angel, and Tempus in support zone. I played Lilariah and another Cornicen from hand and never saw my next turn.
No error message popped up like it had been doing when it ran into endless turns and no log file to send. It just froze forever. I had to close out IW and was hoping that it counted as a tie when I got back. Nope.