Taunted! Wait, Is It?? {GAME PLAY}

I was playing summoner's rift and enemy team had a Shen . He used his Taunt as I clicked another enemy champion. Guess what happened. I walked to the target I clicked on WHILE I WAS STILL TAUNTED. Somehow I couldn't attack or cast skills while taunted, but I still moved to the target I clicked on. Also, I played Rammus , and I taunted enemy team's Kha'zix to save our teammate. And the bug happened again... Kha'zix kept walking to my teammate while the taunt skill was used. This makes no point of taunting the enemy team. It is a minor bug, but I really want you to fix it to make better game plays. And yes, I have checked if enemy team had Cleanse, Quick Silver, or Michael's Crucible but they had non of these. Please fix it soon as possible. Thank you.