Different conversation, @BIGRUBIGDBIGredmachine was talking about Johnson's kick step working with the silent count from Kelce.The penalty on Kelce wasn't for moving his head, it was moving the ball forward. That is a penalty!
As for Kelce's moving the ball forward, they've warned him about it. He admitted he was trying something after the game. From Kempski's article:
7) The 'We Warned You' Award 🦓: Jason Kelce, and the officials
Over the years, Kelce has moved the ball forward a half yard or so at the line of scrimmage before running QB sneaks. It was a clear advantage, and something that the NFL has apparently sought to eliminate from the game.
"I put a target on my back for doing that in the past," Kelce acknowledged. "That one... really not trying to do it. I just lined up a little bit too close, trying to get down and set. Usually you get a little leeway with it. I think because it was so short that the fact that I did it at all was going to be... it was just a stupid play. It was like an inches play, 90-something percent chance play. Really stupid, and it ended up costing us four points."
"They've emphasized that in the past," Kelce said. "They've emphasized it less with me lately because we just haven't done that as much. I know that they're looking at everything on [Brotherly Shoves], so I really try my hardest not to do that."