Master Yi freezes Large Jng Monsters (Gameplay)

If timed right with the large jungle monsters (monsters with buffs) Master Yi' Wuju Style (E) will lock the monsters in place and they will not move or attack, no animations at all on the monster. I have found that using the E ability just before the monster attack it causes the freeze. Master Yi's Alpha Strike (Q) unfreezes the monster and it will continue as normal, but it can be cheesed by auto attacking the monster to death without the player taking any damage. I have had this occur as many as 4 times in just one match.