Issue #3167363: Children block not rendering children in Layout Builder

src/Service/MenuLinkTreeHandler.php

@@ -85,12 +85,6 @@ class MenuLinkTreeHandler implements MenuLinkTreeHandlerInterface {
     $view_mode = $entity->id() ? $this->getMenuLinkContentViewMode($entity) : 'default';
     $render_output = $view_builder->view($entity, $view_mode);
 
-    // Build the entity view ourselves and unset the #pre_render so that it
-    // doesn't run twice later on, when rendered.
-    // This gives us access to all fields immediately in the menu template.
-    $render_output = $view_builder->build($render_output);
-    array_pop($render_output['#pre_render']);
-
     // Unset cache, handled by menu_item_extras_link_item_content_active_trails.
     unset($render_output['#cache']);