I think you moved the queen yourself in analysis mode which is enabled after game over? Did you want to move h7-h6?
Is this a bug or what?
No, that move was played some time before he took pawn on h6. I was going to take his queen next. But as soon as he took that pawn on h6, game was over.
Please look here http://www.chess.com/livechess/game?id=730139388. He took the pawn on h7 and I think you moved his queen after game over when board switches to analysis mode.
Cheers
If you need help, please contact our Help and Support team.
Just to add, that gay left immediately after the game gave him the victory.