Bug #1) Cannot raise Shelter Happiness.
On day 20, despite having eight buildings, six of which have Comfy Beds inside, my happiness never raised above 5.0. When a hearthling was dumb enough to sleep outside, it would drop to 4.9, then raise back to 5.0 later. This meant that I also got no new hearthlings, at all, because my happiness was too low.
Bug #2) Taking building parts from other buildings.
Hearthlings will sometimes take parts from existing, finished buildings rather than going to to the stockpiles. I observed this with Mean Beds and the fancy diamond windows. If you build a building that uses certain pieces, and another of your buildings arleady has those pieces, they’ll grab it from the building instead of the stockpile, even if the pieces are in stockpile (i guess the other building was closer?) This leaves buildings without windows and no way to fix it since they are already complete.