Ezreal Crit Animation Bug

Hey I discovered a bug while trying out a game of full crit Ezreal. It looks like one out of his main 3 or 4 crit animations simply triggers a walking animation or a standing still animation while critting. The sound, projectile and change in stance do not occur with that one crit. I'm not sure if it's repeatable but I will test it more when I get home from the gym.

See Clearly, Summoners.