Weird delayed movment bug.

Had the weirdest bug in my last game playing lucian. Everyone on the map were moving at approx. 100ms, and then jumping to places. No lag on ability usages, autoattacks or anything else. No graphic lag, no ping lag, just this weird movement lag. Also with my FPS capped at 60 my client was showing 110FPS, which i believe may be a part of the bug? when i tried reverting the video settings to normal, the bug stayed, but my FPS went up to 200, with no graphics lag. Which is strange as my pc doesn't have the easiest of time running the game at 60FPS. I also restarted the client twice, with no changes to the situation.

http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/2376489195/201028219?tab=overview

I tried testing if there was any real lag multiple times, and there isn't. I 1v1'ed someone twice despite the awkward situation, and AA spacing, and ability comboing was fine, i just couldn't really tell whether it was, and quite WHERE i was (which ofc was a mess in multiple player situations.)