Note the daft whatsit sleeping in the high density farm plots below - whether it’s due to pathfinding issues relating to the 65x65 structure plot at the base of the screen I don’t know, but at least one hearthling consistently bugs out and likes to hang around idling, on matter their profession or what they should be doing right now. That means no sleeping, eating, harvesting, building… nothing:
Reloading the game will fix this, but usually results in the bug being passed on to another hearthling. Occasionally it’s passed on to several hearthlings.
it spreads around like wild fire to all the other hearthlings - we need a cure!