Nautilus auto bug

I played fiddlesticks last game and multiple times I would fear him before his animation for his auto would go off, like, his anchor was just starting to raise into the air for the auto animation, and even though I feared him before it complete, his root still went off, and was able to cc me. For the record I won that game, so I'm not salty bout it or anything but it's definitely a bug and not ping I have 30 ping consistent, so I doubt it was a lag thing, multiple times.