Afraid to say, having seen the replay...it did look like he let his arm slow ever so slightly to ensure it blocked the cross. Harsh, but if it were against us I'd be screaming for a penalty.
That doesn't excuse every other decision that has gone Fulham's way, and their obnoxious arrogance which is shown whenever anything has not been given their way. The only comfort is that they are so reliant on Mitrovic, and he's never been that great in the Premiership, so they'll be coming back down next year.