EDIT

I found one minor issue while investigating this: The NOMENCLATURAL_TITLE was being used for the caption of the collector filed

These problems are related to the changes made for #7535

The root cause is the code line

private void updateToolBarButtonStates(){
  ...
  if(teamOrPersonSelect.getValue() != val){
      teamOrPersonSelect.clear();
  }

a second level problem detected is that updateToolBarButtonStates() is called too often. it is called at the end of setInternalValue() which covers most usecases.