80% of the times I join the lobby of a relatively large server I crash after a couple seconds. Every time, the message in the game output looks like this:
http://puu.sh/qEBeD/6968dc3575.txt

No crash-report was generated.
I am not sure if this is a bug, but it seems to appear in multiplayer only, also, after a google search, I found out that other people have this issue as well, but none of them really knows how to fix it so I was wondering whether this might be a Minecraft bug/problem. I tried reinstalling and updating Java, but it did not work.
Thank you for your help,

Kind regards
P.L.

P.S: This happens on Minecraft 1.8.x and 1.9.x as well. I usually use Optifine, but this seems to happe without OF either. Thank you.