Darius Taunt Bug

I've been playing Darius, and every now and then when I use my crippling strike (W) Darius will continue to chase my opponent for up to 3 seconds afterwards as if he is taunted even though champions like Sion or Malphite do not have taunts. A few of my friends noticed it on Olaf's reckless swing or (E) as well I don't know if its something to be noticed but they told me to go ahead and submit a notice to you guys. It doesn't happen every time but it gets really annoying when I'm in the middle of top lane and I attack my opponent and then can't disengage and I walk all the way to the opponents tower and can't stop Darius. (It is also not a hardware issue / mouse / keyboard issue I have replaced batteries, unpluged and repluged, and even played on a different computer).

Some ways to reproduce this issue I have been having is to be in lane and auto attack an enemy champion immediately press w (for crippling strike) to cancel the auto animation and attack again and click auto again and Darius seemingly become taunted.

It happens During or after the w strike. When you try to click away Darius is unresponsive as if he had been taunted into following the enemy. The taunt ends when the crippling strike cool down ends (sometimes after it is used it still shows it hasn't been so he keeps chasing).

However sometimes just when I'm auto attacking champions the issue also occurs.

I apologize for no screen shots or videos. However I hope this helps!

                           Thanks for all you do!
                          
                                                                  Summoner: Keng Teong