Ticket #35407: 35407.1.diff

src/wp-includes/link-template.php

@@ -1208 +1208 @@
         $post_type_object = get_post_type_object( $post->post_type );
         if ( is_post_type_viewable( $post_type_object ) ) {
                 if ( ! $preview_link ) {
-                        $preview_link = get_permalink( $post );
+                        $preview_link = set_url_scheme( get_permalink( $post ) );
                 }
 
                 $query_args['preview'] = 'true';