I did some fcking around on the server and turns out if i do /spawn and teleport to spawn before my client crashes, I have no problems playing on this server.
Strange I thought and tryed to get back to my base, but in a area of 150 meters around the base is like a "crashfield". As soon as I get within range of my base my client crashes and I have to restart again and do /spawn to not crash again.
What can this be?