[Gameplay] - bug with Sivir's spell shield when Leona uses her Q

UPDATE: This has been explained in the comments, So no problem anymore. (and yes I mean her E not her Q sorry) I have been playing Sivir for a loooong time and really like this champ, I especially love the spell shield as it can really ruin the enemy's plays and give you a nice shot of mana back, however, Its not much use when it doesn't actually work. The problem is when Leona uses her E (the pull) and Sivir tries to spell shield it. The damage is blocked, the mana is given... but Leona still pulls herself to you! This is a big problem through out the entire game and really stops Sivir from being able to play properly against a Leona lane. There are a few other weird things with her spell shield but this is the main problem. It has been around for quite a while and really needs to be fixed, after all Sivir's shield can block both bliz and thresh's hooks/ grabs and the action is canceled and the damage negated, mana is restored and Sivir is happy. I was able to recreate this bug about 3-4 times in one game but I have experienced it many many time before in the past. I have a video of it here: Video Thanks for reading, I hope you can fix this and improve the game :)