Auto-Attacks Disappearing Bug

Hi All - I've seen a few post centered around this, so I wanted to create a sticky to possibly gather more info around a bug where projectiles are simply not appearing yet doing their expected damage. Sometimes animations don't activate either. You'll more often notice it around ADC simply because their bread and butter is auto-attacking. Any help regarding this, either a log, screenshot, or video, would really be appreciated. Thanks guys, and I hope you can help track this issue down. Riot Chesties {{champion:21}}
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