Skip to 3:05 to see the ref announce they’re wiping the TD off the board for an invalid fair catch signal (and ensuing replay for you to make up your own mind).
IMO, DeJean was just running and not attempting to signal, and I think all the players, commentators, and fans viewed it that way live. The refs on the other hand…
Strictly speaking, yes, the rule ended up being correctly applied, but it’s disingenuous to say it’s straightforward or even uncomplicated. It’s a rule which rarely comes up, so these hair-splitting judgments haven’t been meted out. No one on the field understood the infraction, the refs didn’t even flag it live, and the whole review was not clearly communicated. And worst of all, it’s not clearly established this type of infraction is reviewable (which has not stopped refs from overstepping boundaries before).
Heck, I wanted Minnesota to win, but not with this sort of controversy.