diff --git a/core/lib/Drupal/Core/Form/FormBuilder.php b/core/lib/Drupal/Core/Form/FormBuilder.php
index 6aeeffd..8bd3129 100644
--- a/core/lib/Drupal/Core/Form/FormBuilder.php
+++ b/core/lib/Drupal/Core/Form/FormBuilder.php
@@ -314,6 +314,9 @@ public function rebuildForm($form_id, FormStateInterface &$form_state, $old_form
    */
   public function getCache($form_build_id, FormStateInterface &$form_state) {
     if ($form = $this->keyValueExpirableFactory->get('form')->get($form_build_id)) {
+      if (\Drupal::getContainer()->initialized('session_manager')) {
+        \Drupal::getContainer()->get('session_manager')->startLazy();
+      }
       $user = $this->currentUser();
       if ((isset($form['#cache_token']) && $this->csrfToken->validate($form['#cache_token'])) || (!isset($form['#cache_token']) && $user->isAnonymous())) {
         if ($stored_form_state = $this->keyValueExpirableFactory->get('form_state')->get($form_build_id)) {