Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
It seems your sitemap was being cached on your site. I added `https://yourdomain/(.*)sitemap(.*) in the list of pages to be excluded from caching in your site (WP Fastest cache > Excludes) which should exclude all sitemap URLs from caching. Please do the following:
1. Head over to WordPress Dashboard > Settings > Permalinks
Hit the save button once.
2. Go to WordPress Dashboard > Rank Math > Sitemap Settings
Hit the save button once.
3. Remove submitted sitemaps on your GSC and resubmit only the main sitemap file(sitemap_index.xml)
That should fix the issue.
If it doesn’t, please do let us know so we can look at this further.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.