[GAMEPLAY] Basic attack canceled while animated

When playing Jinx , on Summoners Rift, i noticed that a few times the basic attacks get canceled after the animation. But it is not like I didn't let the animation finish. I played as Jinx, I saw the rocket fly and hit Vayne , but no explosion and no damage. Same happened when in mini-gun form when farming. I do not know if this happens to other champions too. I believe this is cause by a movement command that follows to fast on the attack, because in both situations i fired and moved back.