Lol, so if they threw the ball on 4th down and the receiver was hit in the head, do they go to the slow motion replay to see if the player was hit before the pass hit the ground? Because that's the exact same situation. I've certainly never seen that. And it would be absolutely absurd.
Dead ball fouls mean a specific thing. Fouls that happen while not in the course of play. That was very clearly a foul commited during the course of play. Even if it is somehow a correct application of the rule, it is a technicality and needs to be fixed, because that is crazy.