diff -u b/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
--- b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -1186,7 +1186,12 @@
         'revision_timestamp' => TRUE,
         'revision_log' => TRUE,
         'revision_translation_affected' => TRUE,
-        $this->getEntityType()->getKey('revision') ?: 'revision_id' => TRUE
+        $this->getEntityType()->getKey('revision') ?: 'revision_id' => TRUE,
+        // We skip both known names of the changed field, because it gets
+        // updated through the Form API even if the user hasn't submitted any
+        // changes.
+        'changed' => TRUE,
+        'content_translation_changed' => TRUE
       ];
     }