Severe fps drops since 8.6

Hi. Recently I've been experiencing constant fps drops in games, to the point where the game is just unplayable. The game just freezes for up to a minute and the strangest part is that this started happening not right after 8.6, but only few days ago. Checked my system and tried other games, league is the only one with this issue. I wonder whether somethings has been changed what could be causing this and is someone else experiencing it? Interesting point: I believe this might have started happening after I logged in onto my EUNE character, which I haven't done in years (I play on EUW now). This might require further testing, but, strangely, it seems that I'm experiencing the fps drops on EUW only and not EUNE. Could this be possibly caused by connection? The latency seems fine on both servers.
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