An unpublished note field will be indexed and is searchable in the PUI, though the contents of the note do not display. Unpublished notes should not be included in the PUI index.
Create a new resource with an unpublished note.
Publish the resource, but leave the note unpublished.
In the PUI, search for the contents of the unpublished note field.
Search results will include the resource with the unpublished note field.
Tentatively labeling as major since this causes issues in search result relevancy and may also imply existence of data that should not be exposed to the public.