When clicking "Join" after waiting through a world queue, it sends you back to the instance page, asking you to queue again. This issue seems new since this week's release. I experienced it on 1538 and 1548 (open beta). The issue also affected a friend, so it doesn't seem to be only me.

I experienced the issue on two separate worlds, both with queues. However, I was on priority queue for both, so that may be related.

The issue is inconsistent. I triggered it three times in a row, then joined, left, and rejoined the queue and it worked.