Instagram API /tags/tag-name/media/recent min_id not working

Code that has been working unchanged for literally 2 years has stopped working today. It seems the /tags/tag-name/media/recent query is ignoring the min_id.

Request with and without the min_id are returning the same data. Test for yourself: http://instagram.com/developer/api-console/

http://stackoverflow.com/questions/24028968/instagram-api-tags-tag-name-media-recent-min-id-not-working