When players point it out. Even when Mag pointing to the score board was fairly benign. As far as the flagrant 2, I have no idea why they called that? Bad interpretation? They also rewarded Wisconsin by calling fouls for their drives and not ByU, so that wasn’t called consistently. What you want from officiating is consistency and that didn’t happen.
I do understand these may have been WCC or MW refs that had officiated prior ByU games. No idea if there is some history or bias.