[Gameplay] Loose Cannon's Ult is a Dud

During a ranked game, I was playing Jinx. A team fight broke out mid and the enemy team was on the retreat. Caitlin was rather low, and thinking that my ult would kill her i shot it at her. Should have made contact, but instead it went right through her. The Caitlin even admitted that it went through her. She was roughly at a 1/4 of health. This is all i can really remember.

I haven't been able to recreate it... But then again, i haven't played her for fear of this happening again.