I'm having an issue with my house after 1.2 and after researching any changes that may have been made My house is still invalid. It's all made out of stone and I've never had an issue like this before. My houses before 1.2 have been much bigger and much smaller but were always valid

Is there a size limit to how large a house can be? I tried adding a row of stone from where the corner torch above the door is to the other side but still said not valid.
EDIT: It seems I did reach some size maximum in the previous picture, but the one below shows that its suitable and the guide moved in.
