diff --git a/core/lib/Drupal/Core/Render/Renderer.php b/core/lib/Drupal/Core/Render/Renderer.php
index 096551b..5167238 100644
--- a/core/lib/Drupal/Core/Render/Renderer.php
+++ b/core/lib/Drupal/Core/Render/Renderer.php
@@ -165,6 +165,17 @@ protected function doRender(&$elements, $is_root_call = FALSE) {
       return '';
     }
 
+    if (isset($elements['#render_children']) && empty($elements['#children']) && $elements['#theme'] != 'page') {
+      $children_keys = Element::children($elements);
+      $output = '';
+      foreach ($children_keys as $key) {
+        if (!empty($elements[$key])) {
+          $output .= $this->doRender($elements[$key]);
+        }
+      }
+      return $output;
+    }
+
     // Do not print elements twice.
     if (!empty($elements['#printed'])) {
       return '';
@@ -293,9 +304,7 @@ protected function doRender(&$elements, $is_root_call = FALSE) {
     }
 
     // Call the element's #theme function if it is set. Then any children of the
-    // element have to be rendered there. If the internal #render_children
-    // property is set, do not call the #theme function to prevent infinite
-    // recursion.
+    // element have to be rendered there.
     if ($theme_is_implemented && !isset($elements['#render_children'])) {
       $elements['#children'] = $this->theme->render($elements['#theme'], $elements);