@ItsMoonFish As WR, I also noticed a lot of block in the back penalties.
Backstory:
I play a co-op Dynasty with my brother and we were getting a ton of them on outside runs.
I started a RTG as WR, on a run, I get a block then just kind of stand there. I noticed that if a defender crosses in front of my player, the game triggers a block animation without input. (And worse, this happens off screen in Dynasty as well.) Because of this, I would have to get a block then basically run off the field.