I Have Hearthlings stealing already-set doors and windows in order to place them in ones that still need them.
Steps to Reproduce:
Begin building building without enough doors/windows. Allow Hearthlings to get the roof started and then build the required trim.
Hearthlings use stockpiled windows and doors to set up the building.
Hearthlings cannibalize doors and windows already in the structure.
This seems to most easily be reproduced when hearthlings have already started the roof before they’ve been given the missing doors and windows.
P.S. I swear I’d started something like this ages ago but cannot find it.