Ticket #47053: 47053.3.patch

src/js/_enqueues/lib/admin-bar.js

@@ -505 +505 @@
                         aB = d.getElementById('wpadminbar');
 
                         if ( d.body && aB ) {
-                                d.body.appendChild( aB );
 
                                 if ( aB.className )
                                         aB.className = aB.className.replace(/nojs/, '');

src/wp-includes/default-filters.php

@@ -535 +535 @@
 add_action( 'admin_init', '_wp_admin_bar_init' );
 add_action( 'before_signup_header', '_wp_admin_bar_init' );
 add_action( 'activate_header', '_wp_admin_bar_init' );
-add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
+add_action( 'wp_body_open', 'wp_admin_bar_render', 1000 );
+if ( ! did_action( 'wp_body_open' ) ) {
+        add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
+}
 add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );
 
 // Former admin filters that can also be hooked on the front end