Yes, Same problem.
Import songs in playlists that are NOT currently in the collection but dragged from windows explorer to playlists (on external devices) are replaced by random songs already in the collection. When dragging a track, it's greyed displayed with question mark and after analyzed replaced by wrong song. Same with iTunes tracks not currently in the collection but dragged from bridge window to playlist (on external drive). Please make RB stable, fast, and make features already in RB working like it has to be before adding new features!