Diplomacy window doesn't update consistently

[Celarious]

The diplomacy window (accessed from its tab in the F12 UI and through the dedicated sidebar button) doesn't seem to always update whenever things are changed, causing it to display old dossier/stance information:

• Changing your stance towards an empire doesn't appear to do anything, because the window doesn't update
  
• Adding notes doesn't update the window, even though a confirmation message is sent
  
• Sending a diplomatic message doesn't update the window, even though a confirmation message is sent
  

The changes do take effect, but closing/opening the window and "requesting empires" doesn't cause it to update

The following does force the window to update:

• Changing war policy
  
• Changing contact stance
  
• Changing the status of any dossier event