I bought a house & within 5 mins of looking around all items & people in the house turned invisible & I was locked in 1st person view.

All the shelves, tables etc are there, but there are no items like plates, books, weapons. They still exist to pick up, but not visible.
If I walk up to a shelf and bump into it, the items appear for a moment & then disappear again.

I know Lydia is in the house somewhere as she is talking, but I cant find her. Sometime the talk prompt comes up, but its too quick to press.

I saved the game & reloaded my save, it was still the same.