WowAce

When entering a Celestial dungeon in MoP Classic dungeon roles fail to load onto the frames.

Any LUA Error ?

Maybe some filter enabled in the dungeon role status Load tab configuration ?

No errors show up in bugsack and I have that indiactor set to load on Heroic dungeons, Mythic dungeon/raid and normal dungeon. I think I've had similar issue when the new type of dungeons (elemental rune) came out back in Cata as well

It has sense if these special dungeons are not classified as normal, heroic or mythic dungeons, and probably they are classsified as "other" in load load condition tab.

You can check out if the status shows up when no load conditions are activated, or when "other" filter is enabled in load/instancetype tab.