Horrendous lag when I started a game on the PBE

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As you can see from my MS in the top right, joining a game on the PBE caused me to have unplayable lag, and that isn't the extent of it, it was spiking anywhere from 500-6000 It started only when I got into game, and ended when the game ended. I was unable to play for the entire game and chose to sit back and avoid dying in lane rather than try to play with it. It seems directly related to playing a game on the PBE but has never happened to me before, I want to convince myself that the timing was just a coincidence but it was such perfect timing when it started and ended that I'm not so sure. EDIT: Also received a bunch of low priority queue games for something that is far out of my control.
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