diff --git a/core/lib/Drupal/Core/TempStore/PrivateTempStore.php b/core/lib/Drupal/Core/TempStore/PrivateTempStore.php
index 651227c..62aa65a 100644
--- a/core/lib/Drupal/Core/TempStore/PrivateTempStore.php
+++ b/core/lib/Drupal/Core/TempStore/PrivateTempStore.php
@@ -125,6 +125,13 @@ public function set($key, $value) {
       }
     }

+    // Ensure that an anonymous user has a session created for them, as
+    // otherwise subsequent page loads will not be able to retrieve their
+    // tempstore data.
+    if ($this->currentUser->isAnonymous()) {
+      $this->requestStack->getCurrentRequest()->getSession()->set('forced', TRUE);
+    }
+
     $value = (object) [
       'owner' => $this->getOwner(),
       'data' => $value,