Quinn's Vault on Nocturne's Flash

Weird bug, but I was just in an ARAM game on Murder Bridge where I was vaulting onto a low health nocturne for the kill, he used flash like a millisecond after i started the vault animation and Quinn bugged out. Her Vault animation stuttered - like she started it, then it snapped her back to where she was standing originally - then the animation picked back up and she rebounded off of where noc was, not where he flashed to, did no damage, burned the timer, and was effectively stunned when the animation was finished giving the opposing team an easy kill on my helpless Quinn.