Ticket #47606: 47606.2.diff

src/wp-settings.php

@@ -352 +352 @@
 }
 
 // Create an instance of WP_Site_Health so that Cron events may fire.
-if ( ! class_exists( 'WP_Site_Health' ) ) {
-        require_once( ABSPATH . 'wp-admin/includes/class-wp-site-health.php' );
+if ( 'DOING_AJAX' && isset( $_REQUEST['action'] ) && 'health-check-site-status-result' === $_REQUEST['action'] ) {
+        if ( ! class_exists( 'WP_Site_Health' ) ) {
+                require_once( ABSPATH . 'wp-admin/includes/class-wp-site-health.php' );
+        }
+        WP_Site_Health::initialize();
 }
-WP_Site_Health::initialize();
 
 // Load active plugins.
 foreach ( wp_get_active_and_valid_plugins() as $plugin ) {