Me and my friend expirience the same problem.
We both not from US,on US server.
Both changed ours characters and goes to PotD.
Now we stuck in this location (for more then 30 hours now) can't do anything.
Can't teleport,can't summon mouts,can't damage local enemies,can't change location,nothing...
Now all i want is world transfer as soon as i can)
Gonna try this MTU settings.