Caitlyn AA Bug

I was playing caitlyn today with my friend supporting me and him and I noticed there was a bug with her auto attacks. when you click on the target you want to Auto Attack, the damage calculates instantly as opposed to it having the animation finish. an example of this being a problem is when farming minions i would AA and miss out on the cs because the damage would happen quicker than the animation. Sorry if you didnt understand im terrible at explaining