I noticed only Workers will continue to work on non-class jobs such as mining and building. For example, if you promote someone to a blacksmith, he’ll only do blacksmith jobs at his workshop. Occasionally he might deign to pick up the scattered pieces of wood/ore lying around, but for the most part he (and all other promoted Hearthlings) will just idle.
Is this expected behaviour? It’s really annoying when you’re early in the game and have more than half of your tiny workforce promoted, leaving only the remaining 1-2 guys to do all the mining, road laying, etc.