This bug happenned to me twice now, and exactly the same way.
As soon as I enter the town called Necropolis, my ping goes to 1000ms.
In the town I can't find the city hall, or bank, or any other building with tools, just random houses, and some of them are incomplete. The town has a bunch os pcs standing still at the first house, all of them are there for at least 24hrs.
Sooner or later I'm disconnect and if I try to relog I get the famous error "your character is already in the world".
Hope you guys can figure out what's going on.

Me too ID 4603