A really annoying bug thast been a problem since last patch, has nyone else had it?

Recently, since about last patch, my games of lol have been incredibly laggy. Not due to ms or fps, but something different entirely: When i try to move my camera, it moves very slowly and jaggedly, and my abilities go through slower and at weird angles, while neither my fps drops below 60 or my ms rises above 30. Anyone else have this problem? is it a problem with my computer? I'm not having this issue anywhere else but i suppose its possible.
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