I've encountered several glitches in the small red wooden house with the concrete base.
1.) You can't fit through the door at the bottom of the stairs
2.) The door at the bottom of the stairs opens into the wall and won't close
3.) You cannot place logs/campfire into the fireplace.
I haven't tried to reproduce but I've encountered a few other houses that fireplaces don't work and other buildings where you cannot fit through the door. I assumed it was the same issue.