Ticket #42457: 42457.1.diff

src/wp-admin/customize.php

@@ -42 +42 @@
                 get_post_time( 'G', true, $changeset_post ) < time()
         );
         if ( $missed_schedule ) {
-                wp_publish_post( $changeset_post->ID );
+                /*
+                 * Note that an Ajax request spawned here instead of just calling `wp_publish_post( $changeset_post->ID )`.
+                 * The reason for this is that WP_Customize_Manager is not instantiated for customize.php with
+                 * the `settings_previewed=false` argument. Because of this, settings cannot by reliably saved just
+                 * since some settings will short-circuit if they detect that the current value is the same as
+                 * the value to be saved. This is particularly true for options due to logic in the update_option()
+                 * function. For more, See #39221. So by opening an Ajax request, then the changeset will get published
+                 * where WP_Customize_Manager will not have been instantiated with `settings_previewed=false`.
+                 */
+                $nonces = $wp_customize->get_nonces();
+                $request_args = array(
+                        'nonce' => $nonces['save'],
+                        'customize_changeset_uuid' => $wp_customize->changeset_uuid(),
+                        'wp_customize' => 'on',
+                        'customize_changeset_status' => 'publish',
+                );
+                ob_start();
+                ?>
+                <?php wp_print_scripts( array( 'wp-util' ) ); ?>
+                <script>
+                        wp.ajax.post( 'customize_save', <?php echo wp_json_encode( $request_args ); ?> );
+                </script>
+                <?php
+                $script = ob_get_clean();
+
                 wp_die(
                         '<h1>' . __( 'Your scheduled changes just published' ) . '</h1>' .
-                        '<p><a href="' . esc_url( remove_query_arg( 'changeset_uuid' ) ) . '">' . __( 'Customize New Changes' ) . '</a></p>',
+                        '<p><a href="' . esc_url( remove_query_arg( 'changeset_uuid' ) ) . '">' . __( 'Customize New Changes' ) . '</a></p>' . $script,
                         200
                 );
         }