Taric - Kha'zix bug

Hi, earlier this week, I was playing and it was around midgame, where was getting his resets and you know :^). Anyways, I had activated my E which is the skill shot stun, was under my tower about to get a reset on me since I was low, figuring i could stun him under tower. He activated his evolved R, making him invisible, still under turret mind you, only for my stun to not actually stun, which was fully on him I promise. I stunned him multiple times throughout the game, but this time during his R I didn't, even though I full on hit him with it, and died. Hopefully this gets fixed soon <3.