Weird desync with basic attacks (ranged champions)

It **appears** to be that when my character attacks, the damage is calculated instantly (before the animation finishes), what's actually happening is the attack goes off when I click and the animation happens afterwards, making me think I'm lagging or something. I thought it was lag but I checked my ping and everything which seems fine and stays stable throughout the game, leading me to believe it's a graphical error. This only started happening today... Also it doesn't seem to be all champions, just the ones that have a fairly long wind-up time (like Caitlyn, that's the one I feel it on most). I've also tried enabling V-sync but that didn't help either. Anyone else got/had this? It's a strange issue, kinda makes me reluctant to play 'cause it really feels like I've got lag when I know I haven't.
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