JSON version of artist includes gender-id value, which has no xml equivalent

https://beta.musicbrainz.org/ws/2/artist/30bd212f-df1f-4646-aed2-4bc6cef8206d has <gender>Male</gender>
https://beta.musicbrainz.org/ws/2/artist/30bd212f-df1f-4646-aed2-4bc6cef8206d?fmt=json has both "gender": "Male" and "gender-id": "36d3d30a-839d-3eda-8cb3-29be4384e4a9"

Either that gender id is irrelevant, in which case the JSON response shouldn't include it, or it is relevant (e.g. for i18n perhaps?), in which case the xml should probably return <gender id="36d3d30a-839d-3eda-8cb3-29be4384e4a9">Male</gender>.