Interesting discussion on ESPN, the rules as written have the bills getting that opening half TD, rules state, the player must go to the ground/take a knee AND, not appear to advance the ball, not or.
Though common sense looks otherwise, we technically got screwed.
They use the example, if the end of the game, you are in victory formation, the QB gets the snap and just hands the ball to the official without kneeling, it's a live ball. Same applies here, he needed to kneel.
The head official was correct in the initial call, and the other that ran onto the field changed his mind is what's being reported.
Not that this is the reason we lost, but a TD there and the game is different.
Officials aren't allowed to guess players' intent, which is what they did there.