Why don't themes show text fields in the theme editor? (Text, rich text, date, datetime, ...)
Even copying and pasting straight from the docs into a themes "fields.json" doesn't work.
The form input within the div for the field is just blank. It doesn't even get rendered in the theme fields HTML. All other fields work. Color, blog, etc. Groups work, repeaters work, etc. So, I find this rather odd.