Open olayway opened 2 weeks ago
Temporary solution suggested in this comment https://github.com/vercel/next.js/discussions/56708#discussioncomment-10127496 seems to work (https://github.com/datopian/datahub-next/commit/ebea8dc11f1bf0b1deade6f1f9f3c153c1597eec)
Vercel serves the old, cached version of the sitemap. This is a known issue: https://github.com/vercel/next.js/discussions/56708