According to this: https://www.tamriel-rebuilt.org/forum/little-topics-examined#comment-11940, all dialogue entries which mention a location outside of said location should have showmap "Location" in it's results. However, that's not the case in many(all I checked) entries in Roryn's Bluff, probably everywhere else too. Might be better done after every section file is merged to Mainland, so one person can do all of them together.