Please post in the download thread in that case, not here. If yes, it would be a CC issue, not a game issue. If yes, does it also happen when you make a room with only one Maxis object on a shelf in it, using my 'clutter anywhere' mod?
What do you mean by 'a day or two before i posted the first ask here', can you give us a date or a game version? Does this still happen with rooms saved in the current game version?