I have the Heljarchen Hall built, and it is where I live with my entire family. I built the library add-on, but I still have yet to put the first book in any of the cases. Reason: I just watched a friend of mine return to her Heljarchen home after the cell had reset to find TWO ROWS of books that she had inserted into the shelves GONE. Absolutely vanished. Without a trace. Not on the floor, GONE.

Does anyone know if this is a common problem? I am literally afraid to put any of my books on the shelves. Sidenote: I DO have the USSEP installed and am playing on Xbox One. Does anyone know if that is a bug that the USSEP fixes?