I'm a Packers fan, but I have to agree.
The only "justification" I have is that it offsets some Cowboys-benefitting questionable calls earlier on.
-t
The forward progress calls? I agree
The fact that the ground knocked it out of his hand meant he never had control before it hit the ground.
He made a move to run forward. He caught the ball then fell. If anything he fumbled and then caught it in the end zone.