Haven't started a new game as yet to check. I know we should be getting a patch fairly soon since a SP is to be released next week and would prefer to wait until it is installed.
As an update, I changed back to playing the Villareal household and noticed there are times the door becomes invisible. As the family was approaching the door, I accidentally jumped up a floor and poof, the door became invisible. It self-corrected within a short time. I went ahead and replaced it but the problem persists so I'm hoping
@BryonyRae can check the house to see if there is a build issue that might even already be known, in case it's a separate issue from the invisible walls. Since I don't build, I'm not up to speed with everything encountered. If it's something like say, a roof overhang on the front porch area, I wouldn't know how to fix that and perhaps she can walk through a workaround, if known. Of course, if she doesn't see the issue at all, that would be a pretty good indicator the save has corrupted.