core/lib/Drupal/Core/Form/FormBuilder.php     | 3 ++-
 core/lib/Drupal/Core/Render/Element/Token.php | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/core/lib/Drupal/Core/Form/FormBuilder.php b/core/lib/Drupal/Core/Form/FormBuilder.php
index 98f7c12..2ef90db 100644
--- a/core/lib/Drupal/Core/Form/FormBuilder.php
+++ b/core/lib/Drupal/Core/Form/FormBuilder.php
@@ -613,7 +613,8 @@ public function prepareForm($form_id, &$form, FormStateInterface &$form_state) {
         $form['form_token'] = array(
           '#id' => Html::getUniqueId('edit-' . $form_id . '-form-token'),
           '#type' => 'token',
-          '#default_value' => $context['placeholder'],
+          '#placeholder' => $context['placeholder'],
+          '#default_value' => $this->csrfToken->get($form['#token']),
           // Form processing and validation requires this value, so ensure the
           // submitted form value appears literally, regardless of custom #tree
           // and #parents being set elsewhere.
diff --git a/core/lib/Drupal/Core/Render/Element/Token.php b/core/lib/Drupal/Core/Render/Element/Token.php
index 8b526c2..0150c22 100644
--- a/core/lib/Drupal/Core/Render/Element/Token.php
+++ b/core/lib/Drupal/Core/Render/Element/Token.php
@@ -29,12 +29,18 @@ public function getInfo() {
     return array(
       '#input' => TRUE,
       '#pre_render' => array(
+        [$class, 'something'],
         array($class, 'preRenderHidden'),
       ),
       '#theme' => 'input__hidden',
     );
   }
 
+  public static function something($element) {
+    $element['#attributes']['value'] = $element['#placeholder'];
+    return $element;
+  }
+
   /**
    * {@inheritdoc}
    */