Connection error only for this game!

I'm playing on this server for months, always had 50-55 ms which is normal.

Last 2-3 days, have extreme lag spikes now it stabilized on 250-1k ms not lower than those.

I'm also playing any other games, for examople i got 50 ping on rocket league servers, 60 on Cs-Go, 80 on wow original server, 12 on team speak.

Only problem is in this game, cleared cache like 10 times. There's no way that its from me, how can i fix it?

I tested my download/upload settings, 35D-8U as usual. Nothing wrong!

Please tell me smt its disgusting to play with those lag spikes etc..