core/modules/node/src/Controller/NodeViewController.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/core/modules/node/src/Controller/NodeViewController.php b/core/modules/node/src/Controller/NodeViewController.php
index b8aa1e5..22cd1ed 100644
--- a/core/modules/node/src/Controller/NodeViewController.php
+++ b/core/modules/node/src/Controller/NodeViewController.php
@@ -55,7 +55,7 @@ public function view(EntityInterface $node, $view_mode = 'full', $langcode = NUL
     $build = parent::view($node, $view_mode, $langcode);
 
     foreach ($node->uriRelationships() as $rel) {
-      $url = $node->toUrl($rel);
+      $url = $node->toUrl($rel)->setAbsolute(TRUE);
       // Add link relationships if the user is authenticated or if the anonymous
       // user has access. Access checking must be done for anonymous users to
       // avoid traffic to inaccessible pages from web crawlers. For
@@ -89,6 +89,9 @@ public function view(EntityInterface $node, $view_mode = 'full', $langcode = NUL
       }
     }
 
+    // Since this generates absolute URLs, it can only be cached "per site".
+    $build['#cache']['contexts'][] = 'url.site';
+
     // Given this varies by $this->currentUser->isAuthenticated(), add a cache
     // context based on the anonymous role.
     $build['#cache']['contexts'][] = 'user.roles:anonymous';