Chess.com computer opponent throws games, even at hard difficulty?

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Avatar of MoronRob

I was disappointed to find that, as far as I can tell, the computer opponent at chess.com will be a poor gauge of my performance, due to its throwing games.
 Perhaps I am making a faulty inference here, but it seems to me that there can be no lower standard for a computer opponent than the ability to avoid being mated when mate is not forcible.  Observe the final move of the game below:
Am I wrong in thinking that the computer went from a winning position, or at least a position in which mate couldn't be delivered, to one in which it could?  Despite being able to say I've beaten chess.com on the hard setting, I feel cheated, rather than exhilarated.
Avatar of erik

there is some problem in the computer with back-rank mate that we are looking into. sorry!