diff -u b/core/modules/menu_link_content/src/MenuLinkContentAccessControlHandler.php b/core/modules/menu_link_content/src/MenuLinkContentAccessControlHandler.php
--- b/core/modules/menu_link_content/src/MenuLinkContentAccessControlHandler.php
+++ b/core/modules/menu_link_content/src/MenuLinkContentAccessControlHandler.php
@@ -53,16 +53,16 @@
         if ($account->hasPermission('administer menu')) {
           return AccessResult::allowed()->cachePerPermissions()->addCacheableDependency($entity);
         }
-        // If menu link is internal, and user has access, grant view access to menu link.
+        // If menu link is internal, and user has access,
+        // grant view access to menu link.
+        /** @var \Drupal\menu_link_content\MenuLinkContentInterface $entity */
         if (($url_object = $entity->getUrlObject()) && ($url_object->isRouted())) {
           $link_access = $this->accessManager->checkNamedRoute($url_object->getRouteName(), $url_object->getRouteParameters(), $account, TRUE);
-          if ($link_access->isAllowed()) {
-            return AccessResult::allowed()->cachePerPermissions()->addCacheableDependency($entity);
-          }
+          return AccessResult::allowedIf($link_access->isAllowed())->cachePerPermissions()->addCacheableDependency($entity);
         }
         // Grant view access to external links.
-        elseif ($url_object->isExternal()) {
-          return AccessResult::allowed()->cachePerPermissions()->addCacheableDependency($entity);
+        else {
+          return AccessResult::allowedIf($url_object->isExternal())->cachePerPermissions()->addCacheableDependency($entity);
         }
 
       case 'update':
@@ -84,6 +84,9 @@
 
       case 'delete':
         return AccessResult::allowedIf(!$entity->isNew() && $account->hasPermission('administer menu'))->cachePerPermissions()->addCacheableDependency($entity);
+
+      default:
+        return AccessResult::neutral();
     }
   }