Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
Please share your URL with us so that we can investigate and troubleshoot the issue further for you.
Since you already flushed the permalinks, let’s go through the rest of the initial troubleshooting step below:
1. Exclude the Sitemap files of the Rank Math plugin in your caching plugin. The cache could be via a plugin or from the server. For plugins or Cloudflare, please follow this article:
https://rankmath.com/kb/exclude-sitemaps-from-caching/
2. If the above steps don’t seem to work, kindly apply the following filter to your site.
add_filter( 'rank_math/sitemap/enable_caching', '__return_false');
Here’s how you can add filter/hook to your WordPress site:
https://rankmath.com/kb/wordpress-hooks-actions-filters/
Looking forward to helping you.
Thank you.
Thanks – it has since resolved itself. It must have been some sort of caching, even though I had done all that.