In this save one dwarf (Kogan Oshoshstinthad the fisherdwarf) locked in his own quarters is trying to have a meeting with the duchess. The duchess herself isn't in 'attend meeting' status and is just loitering about in the meeting areas. However this is preventing the human diplomat from holding meeting with her. Once I unlock the dwarf's door and he have a proper meeting with the duchess the diplomat then proceeds to hold a meeting with the duchess.