ball was tipped. Wouldn't that aspect of the play be reviewable (i.e. whether or not it was tipped)?
This whole thing could have been avoided:
OFFICIAL #1 (to sideline official): So, no PI on that one?
SIDELINE OFFICIAL: Nope. Ball was tipped.
OFFICIAL #1: Hmm. Did anyone else see the ball tipped? ... anyone? ... No ... OK, let's review whether or not it was tipped.
(NOTE: All of this assumes that you could review whether or not the ball was tipped. I'm pretty sure I've seen that done before)