Ticket #50571: 50571.diff

wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php

@@ -172 +172 @@
 
                 $query = new WP_Query( $args );
 
-                return isset( $query->max_num_pages ) ? $query->max_num_pages : 1;
+                $min_num_pages =  ( 'page' === $post_type && 'posts' === get_option( 'show_on_front' ) ) ? 1 : 0;
+                return isset( $query->max_num_pages ) ? max( $min_num_pages, $query->max_num_pages ) : 1;
         }
 
         /**