[wp-trac] [WordPress Trac] #63929: WordPress sitemap not indexing correctly when custom post types are used

[WordPress Trac]

#63929: WordPress sitemap not indexing correctly when custom post types are used
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 Reporter:  abbuabbu      |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 While testing WordPress 6.6 on a live environment, I noticed that the
 sitemap generated via wp-sitemap.xml is not indexing custom post types
 correctly.

 Steps to reproduce:

 Install a fresh WordPress 6.6 setup.

 Register a custom post type (e.g., [cement_price]cementsprice.coms) via
 register_post_type().

 Publish at least 10 posts under this custom post type.

 Visit the sitemap (/wp-sitemap.xml).

 Expected result:
 All published custom post type entries should appear in the sitemap.

 Actual result:
 Some custom post type entries are missing from the sitemap, even when
 published.

 Example Environment:
 This issue was first noticed on https://cementsprice.com/
  while running tests on cement price listings. The environment is:

 WordPress 6.6

 PHP 8.1

 Nginx 1.22

 No caching plugins enabled

 Additional Notes:
 Deactivating all plugins and switching to the Twenty Twenty-Five theme
 does not resolve the issue. It looks like the core
 wp_sitemaps_get_server() function might not properly register custom post
 types in all cases.

 Type: defect (bug)
 Severity: normal
 Version: 6.6
 Component: General
 Contributor Focuses: rest-api, performance, seo

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Ticket URL: <https://core.trac.wordpress.org/ticket/63929>
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