1.8.1 Servers Crashing

Put the summary of the bug you're having here

What I expected to happen was...:
I play on the server normally

What actually happened was...:
My game crashes

Steps to Reproduce:
1. ... I had the lastest version of Optifine and a texture pack installed to my account, however im not sure this is what caused the crash.
2. ... I logged on to a server updated to version 1.8.1 (hypixel).
3. ...There is a sign that you right-click (made by worldedit) to join a minigame and brings you to a lobby where people wait for ghe game to start.
4. ... The game crashes do to a high amount of comprehension taken in by the data running through it (When This Should Not Happen).