There is a bug with the queue for skirmishes that I've experienced reasonably often now, most recently during the CTA event this past weekend. Basically what happens is that you'll be put into a group in a bugged version of the skirmish, which is stuck and unable to progress, either because some clicky thing you're supposed to interact with isn't clickable or a wave of mobs doesn't spawn as it should. (Nobody knows why these things bug out in the first place.)
Often there is also a disconnected person in the group whom you can't remove. So what happens is that people leave once they see that the event is bugged, but the group finder has the urge to keep refilling the DCed person's group, landing people in the same bugged skirmish over and over again.
When this happens it's best to just take a break from trying to queue for this content, because getting thrown into the same bugged event repeatedly is just annoying.