There is an open seam on the rear of the House Condo, between the first and second floor. In addition to being visible from the backyard and showing the inner rooms, it also provides a place for light to leak from sources outside into the rest of the house.
It may be the source of other larger problems, but so far it’s just that it lets lights from outside shine into the bathroom and bedroom. I can be asked to demonstrate this at any request, or to help point out the hole
[edit: same missing face refrenced in this post https://forums.pixeltailgames.com/t/0-4-0-2-missing-face-on-the-back-side-of-house/26030, but I think it’s important to note that it also leaks light into the rest of the house}