Hi
I’m facing the same issue. When calling the CPT with e.g. /wp-json/wp/v2/worship_speaker/?per_page=1&page=6 then I see e.g. a custom field ‘area’ with the correct value, but when I instead call /wp-json/wp/v2/worship_speaker/?per_page=1&page=6&_fields=area, then I see the field, but the value is always NULL.
Suggestions?