Tristana/Zed Bug

Idk what the heck happened, but when I ulted Tristana under her tower she jumped away only to somehow teleport right to my shadow as if she is Zed. Haven't tried reproducing it yet, but I thought someone should know. If it tp's Trist to my shadow when she tries jumping with Mark of Death on her that would be suuuuper OP. It caught me off guard though so I died :P