Ticket #50508: 50508.diff

src/wp-includes/class-wp-customize-widgets.php

@@ -1217 +1217 @@
          * @return bool Whether the widget is rendered.
          */
         public function is_widget_rendered( $widget_id ) {
-                return in_array( $widget_id, $this->rendered_widgets, true );
+                return ! empty( $this->rendered_widgets[ $widget_id ] );
         }
 
         /**