So far, I have been unable to pillage the gold hoard of both gold hoarding dragons I have faced: Kardkildontar and the Spawn of Oroborus.
Both times, I get the complaint that I cannot possible scoop up all that gold when there are monsters about, even though I had wiped out every monster on the level (including the dragons, themselves, of course. I even took out Kardkildontar and his minions twice!)
For Kardkildontar here's a room when you come down that people rarely bother going in in which there are spawns, and in Spawn of Uro the guardians spawn as you go past so its 'likely you missed at least one of these.
Okay. May dominated pet was the problem (Thank you!!) but, if a dragon is a level 30 tag, should level 26 really be too high to let me scoop up the dragon’s gold?
(Lair of the ancient. I may have been 27)
There are several dragons where the gold pile has a level requirement significantly below the accomplishment, in the grand scheme of things its not a big deal but for consistency the max level cap for picking up should be the accomplishment cap.