Ekko Phase Dive (E) teleport glitch
Hey, I just played a game as Zed
and the enemy team had an Ekko 
I had used my ult and was a (LONG) distance away from my shadow, imagine 2-3 Ezreal Q's of range. I reactivated the ability to jump back to my shadow, and at the same time Ekko used the blink/damage part of his E on me, and he followed me all the way back to my shadow.
This killed me, and since he is not supposed to have a 3000 range blink I would without a doubt call the bug game breaking.