Issue with Deleted Author Permalinks in XML Sitemap

Encountering a problem where deleted authors' permalinks persist in the authors' XML sitemap.

Although clicking on these deleted author permalinks results in a 404 error, they still appear in the sitemap's list.

While Ghost successfully generates XML sitemaps for pages, posts, and tags without errors, the issue persists with the authors' sitemap.

Authors Sitemap

P.S.: I'm using managed Ghost hosting, DigitalPress!