I believe this has happened to an older save once before, and can't really put my finger on the specific thing that's causing this issue to occur, although very annoying...
Through my current Solo playthrough this year Feb. 2023, I launched the game and loaded into my save to notice that the walls and roof of the house I'm based in wouldn't disappear as they normally would when you'd walk into a room, so that you could see your player and the tiles within that room. Some walls would disappear, some wouldn't and makes it very hard to tell where my player model is. I ventured out to see if it was just the cell/chunk in the map and it turns out that every single building is broken. After a few minutes of walking around, I noticed that every single buildings physical assets were still in place, but the backend stuff we don't virtually see (like the tiles that determine whether or not it's an inside/outside space) would be translated forward roughly 10-15 tiles. During a period of rain, you could walk into the bugged building, and still get wet or not hear the muffled rain, as you would if you were truly "inside" of the house. But walking into the zone that's been translated (the black H-shaped zone above the house in the first picture, more clearly in the second picture), with no physical walls to see, you would be protected from the rain and your temperature would match room temp.
Very confusing bug to try and figure out for myself, I've looked online as much as possible and even read the two forums I could find relating to this issue with no luck.
I've attached two images as to what I'm seeing. I'm hoping that someone knows about this or even has a known fix for it, as I don't want to lose the save I've spent quite some time on.
Thanks in advance.