#222 - May 14, 2016, 8:26 p.m.
As many have confirmed, this isn't localized to Dalaran (although there's likely many different ways this is breaking, it's not so much a single global issue).
We're continuing to work on this today; as our engineers find things to improve, they push out code changes, and either restart the servers completely (like with a 15 minute countdown to restart) or just instantly crash and restart all the instance of Dalaran running (which is more instant).
This is our #1 issue on the Beta at the moment - we know it's impacting your ability to test the game in virtually all other avenues. Thanks for being patient while we work through it.