How about children born to US military stationed overseas? Most are covered by Status of Forces Agreements that don't allow citizenship in the host country (unless one of the parents is a citizen.) I'm not agreeing with your definition, just curious about your interpretation of a specific case.
My childhood friend who was born in Germany (dad was USAF) was told he was not eligible to be President because of the circumstances of his birth. Citizen in every other way.
Diplomats are the only exception as they carry American “soil” in a legal sense with them.