I was playing the following game, https://www.chess.com/live#g=3748655127
when my opponent stopped [playing, like too many on here, when his position became lost. After the normal time, I had the message that the game would, "Auto ????", in three minutes and the timer appeared. However, once the timer counted down the three minutes, it disappeared and I had to wait the full twenty minutes for my opponent's clock to run out.
Is that just a one-off or a bug?