Ticket #28569: 28569.patch

src/wp-includes/admin-bar.php

@@ -805 +805 @@
 function show_admin_bar( $show ) {
         global $show_admin_bar;
         $show_admin_bar = (bool) $show;
+
+        if ( $show_admin_bar === false ) {
+                remove_action( 'wp_head', '_admin_bar_bump_cb' );
+        }
 }
 
 /**