Rampart's Sheila can be used instead of knife to win Gun Run

Hiya, just encountered this today. Used my Rampart ultimate to try and get rid of some enemies in the endgame and accidentally won the game with it. Showed up in the replay as me killing someone with Sheila. Just thought this was a bit unfair and definitely not meant to happen, so thought it was worth reporting. Happened on Playstation, but crossplay is enabled so probably affects all. Cheers!