re: NFL officials pick and choose when to throw a flag...

Not sure if he was in the neutral zone, but players like Bosa routinely play a little off the line. They do this so they can better time the snap, if they guess right they are already moving when the ball is snapped. If they guess wrong, they have that half step to try to stop before the ball is snapped. Additionally, there is the chance that they can get an offensive lineman to react and get a false start.

The one I would like to see a better angle from is the illegal contact call on the interception. Read an article this morning that said Taylor already had the ball and was returning it before the ref pulled the flag. Based on the replay they showed it was a ticky tack flag that was not enforced all game (carried the contact to about 8 yards), but the questionable part is why did the back judge wait so long to throw the flag?