Has anyone else noticed that joining an In Progress Roulett doesn't work for Healers?

[Squa11_Leonhart]

Just right now, I joined an in progress Brayflox as Tank, 2 dps were present and no healer.

Requested a healer to join via linkshell and she tried to join via low roulette with in progress selected, and.... nothing happens. Not even a duty prompt for some other party.

I've been suspecting this for some time now, I've not been able to join friends instances as healer via in progress roulette for weeks now, where it used to get me an in progress party fairly consistently if the adventurer in need was marked as healer.