I get high-ping as long as I am in a match. It`s like 1000ms, even if the game needs some time to show it. My internet works properly, no other things accept teamspeak where open. I think the first time the bug appeared yesterday.
So I`ve did some more testing. The issue of highping only happens if I am playing with friends. As long as I am alone the game will simply kick me, bag to main-menu. People playing with me are getting kicked too.