[GAMEPLAY] Big range auto attack bug (video)

Hello,

I want to report a bug that happened to me in one of my ranked game. In this video, we can see that i miss my spell. However directly after Katarina make an autoattack with a big range allowing me to take the kill.

http://plays.tv/video/574c237a085b3295c6/bug-range-autoattack-

This problem occurs on Katarina after a spell but i'm not sure that occur on another's champion. I think it is probably a problem on all champions. If it is really a bug, it is important to fix it because i snowball and won the game with that. It can affect the gaming experience of players..