I'm a healer, started as Conjurer and now I'm a White Mage.

Before level 25 or so I never had a problem with the Duty Finder. I clicked sign up and usually it was instant.

Then comes Hauke Manor at level 28, and it took forever. 15-30 minutes at least.
I know for a DPS that sounds fast, but for a healer it's really not. I thought maybe it's that now there's more healers (Scholars can queue as healer now), so that there's a tank shortage.
But a Paladin buddy of mine has the exact same problem.

The fun thing is, when I click on "Duty Status" it shows me 0/1 tank and 0/2 DPS. No DPS? How can that even be?

When this happened the first time, I thought the Duty Finder was down or something, but as soon as I sign up for one of the lower level dungeons, Coppermines or so, I got instant invites again.

All it says is "Readying Duty" and "Reserving Instance". But nothing happens.