Please be as descriptive as possible!
Game mode: Online
If you delete a wall, under an upper LVL doorway (with door), you’re unable to build a new wall in the same place.
You have to move the door into your inventory then place the wall, or 2nd story floor. Afterwards you can place the door back with no trouble.
Again, not sure if it’s a big… Pooping…thought I’d mention it with some time on my hands!