Hello,
Thank you for contacting us. We apologize for any inconvenience this issue may have caused.
Kindly share the sitemap URL with us.
Meanwhile, please follow the steps below for initial troubleshooting:
1. Flush the Sitemap cache by following this video screencast:
https://i.rankmath.com/pipRDp
2. 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/
If the issue persists then try disabling the transient cache for the sitemap. This will make sure that your XML sitemap always reflects the latest changes on your site. To do this, you need to add a small piece of code to your site’s functions.php file or use a plugin like Code Snippets.
The code you need to add is this:
/**
* Filter if XML sitemap transient cache is enabled.
*
* @param boolean $unsigned Enable cache or not, defaults to true
*/
add_filter( 'rank_math/sitemap/enable_caching', '__return_false');
If you’re not sure how to add this code, you can follow this guide: https://rankmath.com/kb/wordpress-hooks-actions-filters/.
After you add the code, please clear any cache on your site or server and check your XML sitemap again.
If you’re still facing issues with the sitemap, please let us know – we are happy to investigate further.