Round table

Recently, I had a case where I freed a hero from a dungeon, and I received a message saying that the hero was released by order of the king, and he disappeared along with the dungeon.
Has anyone experienced something similar, and how often does it happen?

Yeah, it happens...

This happens when there is already such a Hero on the map, and his twin brother is imprisoned... at least, that's what happened to me (it was with Captain, I think).

Then I decided that it was a bug, but later everything fell into place (although the generator should have thought about not spawning a Hero who is in a Dungeon onto the game field).