What happened was the idea was loaded (the model got attached) without a first meeting, then the first meeting was created separately in a different model. After creating the first meeting the second model had its object updated in place so no call to IModel#setObject was made. Even if it had been called since there was this separation the idea model would not have been updated either way. Implementing #setObject in the FirstMeetingModel (in FirstMeetingPanel) that would update the idea model would not have solved since its #setObject was never called.
To get around this we either have to update the idea models object in place (the chosen solution) or detaching it, forcing a reload from the database that would see the newly created first meeting.
