[GAMEPLAY] Vayne taking no damage from ez ult by tunbling

Hey so recently in one of my games playing vayne bot I found that if I tumbled forward at the right time I could completely negate ezs ult damage. This isn't done by dodging the ult in any way but tumbling right into the path of the ult with the right timing. I was able to replicate this again in the same game. Whether its meant to be a hidden mechanic for vayne players or a bug, its worth checking out.