Maybe it happens when your character need to turn to hit, when he isn't facing the enemy? Or he need to move only a little, so little that it's barely noticeable.
I would suspect this except for the fact that it often happens on the
second attack in a row. Meaning, Madora has already approached the enemy and attacked once for 4AP, the second attack will sometimes cost 5AP. Unless her first attack actually staggers the enemy back 1 step?
