However, I copied the end of the title string:
=> [9971, 65039]
65039 is U+FE0F VARIATION SELECTOR-16 – Codepoints which I believe shouldn’t be here.
If I copy the emoji from ⛳ Flag in Hole Emoji and add it to the end of the title, save, and then edit and copy the end of the string:
So far my best guess it the macOS emoji picker is doing something it shouldn’t? Can you take a screen of what you see exactly please ? I might have a mac not on sierra, will try tomorrow.
Also I found this https://github.com/mathiasbynens/emoji-regex/issues/28#issuecomment-321435043 which tend to go in my direction