Insane lagging while showing normal ping; Login problems

I started a normal game and after 10 minutes in started having lags, my ping was at normal 60 rate and I had no dps drops. After 5 more minutes my game started completely freezing like if I had 400 or more ping (it was still showing 60 ping and no fps drops). After getting completely annoyed by this, I left the game to relog and PvP Client was showing me that it is trying to log on for several minutes (also showed the unknown error message). After second several minute try I got into client. I still have lags (tried this in custom) and game still shows that I have a normal ping. Please, fix it, it is actually unplayable. Edit: Forgot to mention, browsers and stuff are working as intented. Has to be a server problem
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