Mouse click delay?

So recently I have been noticing a slight left mouse click delay. For example, I click to my champion to walk and he only walks 0.3 or 0.4 seconds after. I press to auto to cs and he only auto 0.4sec later. My ping is the same as ever (60ms) and my fps are always around 200 and I have never noticed this until now... How do I fix this?
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