[Gameplay] Brand Q (Sear) goes right through Tristana if she is ablaze

Had a game today where Brands q kept going right through the enemy Tristana. it would connect normally if she wasn't debuffed, but if I tried to land the Q while Tristana had the ablaze debuff, it would just go right through her model and nothing happens. This occurred 4 times that game.

I'm not sure if it's just Tristana or if it goes beyond that, because Sear would successfully stun everybody else. She had the rocket girl tristana skin.