I know it happens during a stun with PP2KK but if you're near a wall it doesn't seem to occur oddly. I think it may have something to do with her going off axis, but I know for BT it's always consistent :-/
So apparently if Naotora is backturned and performs PP2KK against a guarding opponent, it won't guard break and the auto 3i high kick will whiff leaving her at nasty disadvantage.... seems legit