[BUG]Miss Fortune ultimate not casting in the right direction

First of all, no, I was not trolling or something like that.

I just played a game with miss fortune and while fighting I used my ultimate- sadly in the wrong direction. My friend shouted at me how stupid I was so I apologized. Deep in my heart I knew that I am not that mentally challenged. So I checked my recording and noticed that my mouse was the whole time in the right direction but still it casted in a different 180° ankle.

In the video you can cleary see that my mouse is already in the right position almost 2 seconds before I pressed R. Even during my ultimate I am aiming for the enemy. In fact I did not move my mouse for 3 seconds.

Link to the bug report on reddit: click me

edit1: obviously its because I hovered over Wukong's portrait so its not a bug at all. Still I dont see a reason why anyone should ultimate in a direction of a teammate with an ultimate which only affects enemies.