Tristana Sound Bug

Lately I've been playing a lot of Trist and after the last patch there seems to be a bug regarding the sound of her auto attack. Note: This is with the Rocket Girl Skin, have not tested with other skins. A good majority of the time when I cancel an auto attack the sound of the auto attack(the rocket shooting) still activates. Also sometimes when I attack the sound will go off twice. It is also worth noting that I have no lag or latency issues and this is the only champ I have had the problem with.