[Gameplay] Thresh Death Sentence Goes Through Leona

I was a playing a team builder game last night with some friends and we were chasing the enemy Leona. The Leona fails a flash over the wall into east river and a second later, Thresh throws a hook that should have landed. The hook just went right through Leona. We got her anyway, but if this were to happen in a more delicate situation it'd be devastating.