[Gameplay] Shen taunt not working properly against a Katarina?

I'm not sure if this was just a glitch for that one game, however during a Summoner's Rift, normal 5vs5 match, every time I used a Shen taunt against the enemy Katarina ,it would cause her to continuously move towards whoever she was aiming for first and not attack my character. The enemy Katarina did confirm that their character did act like they were taunted(unable to control and cancellation of spells). Shen's taunt however worked perfectly fine against all other champions that match, and the following ones I played.