I cant see Animatons/ Lag for no reason?

So basically, LoL has recently been lagging or something for me. The game will run perfectly, then all of a sudden i cant do ANYTHING anymore. Abilty/AA animations are gone for all champs, Minions stay *ALIVE* after they get killed (the minion still aa but deal no dmg and dont move) Jungle camps are no longer visible... And i have 100+ fps and 27 ping THE WHOLE TIME. I dont get it, and I have no idea how to solve this problem. Can anybody help me?
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