core/modules/node/src/Controller/NodePreviewController.php | 1 +
 core/modules/node/src/NodeForm.php                         | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/core/modules/node/src/Controller/NodePreviewController.php b/core/modules/node/src/Controller/NodePreviewController.php
index b1009be..e8ad426 100644
--- a/core/modules/node/src/Controller/NodePreviewController.php
+++ b/core/modules/node/src/Controller/NodePreviewController.php
@@ -26,6 +26,7 @@ public function view(EntityInterface $node_preview, $view_mode_id = 'full', $lan
 
     // Don't render cache previews.
     unset($build['#cache']);
+    $build['#cache']['max-age'] = 0;
 
     foreach ($node_preview->uriRelationships() as $rel) {
       // Set the node path as the canonical URL to prevent duplicate content.
diff --git a/core/modules/node/src/NodeForm.php b/core/modules/node/src/NodeForm.php
index 36cfc74..d1713c5 100644
--- a/core/modules/node/src/NodeForm.php
+++ b/core/modules/node/src/NodeForm.php
@@ -76,6 +76,9 @@ public function form(array $form, FormStateInterface $form_state) {
     $uuid = $this->entity->uuid();
     $store = $this->tempStoreFactory->get('node_preview');
 
+    // Because of the temp store integration, this is not cacheable.
+    $form['#cache']['max-age'] = 0;
+
     // If the user is creating a new node, the UUID is passed in the request.
     if ($request_uuid = \Drupal::request()->query->get('uuid')) {
       $uuid = $request_uuid;