Game freezes all time

[Laethea]

I can do bgs fine, but once I try to do some herbing on my alt in the Jade Forest, the game repeatedly freezes.

[BrokenHunterze]

Happends to me and my friend also.. BUT only when we are in pandaria.
We could take a full dungeon "The jade palace" without freeze. But when we enter pandaria to quetes, it freeze right away