rer.php b/core/lib/Drupal/Core/Render/Renderer.php
index 06f9c4f..aa967e5 100644
--- a/core/lib/Drupal/Core/Render/Renderer.php
+++ b/core/lib/Drupal/Core/Render/Renderer.php
@@ -754,6 +764,7 @@ public function getCacheableRenderArray(array $elements) {
       '#cache' => [
         'contexts' => $elements['#cache']['contexts'],
         'tags' => $elements['#cache']['tags'],
+        'max-age' => $elements['#cache']['max-age'],
       ],
     ];
   }