Possible Caitlyn AA Bug
I just played a Caitlyn game. Im not sure if it was lag or a bug but all of her spells behaved normally, but my auto attacks, not so much. I played an Azir game before this and didnt have this issue.
Whenever I would auto attack, as soon as I right clicked to select a target, my damage went off before the animation. This made csing surprisingly hard. I would right click and the minion/champion would immediately take damage, then my attack would animate, obviously dealing no additional damage. Everything else did behave normally though. My Q didnt do damage early and I would still crit normally.
I didnt actually test to see if it could be abused to attack faster because of there being no animation.
Im about to play Lucian, so if the same thing happens I will edit this and blame lag or an overall auto attack bug.