Getting lag spikes whenever someone dies.

Hello everyone, I have this problem with my client that is very annoying. I can get up to 300+ FPS & I have around 28 ms but weirdly everytime in early game when I kill someone and he dies I get a huge lagspike dropping my fps to 5 and kinda freezing my screen. This also happens when I die. Also sometimes when a jungle monster like grump dies. I really don't know what to do, my performance is fine for the rest.
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