Check node default revision before reindex.

Closes #1522154

core/modules/node/src/Entity/Node.php

@@ -171,9 +171,10 @@ public function postSave(EntityStorageInterface $storage, $update = TRUE) {
       \Drupal::service('node.grant_storage')->write($this, $grants, NULL, $update);
     }
 
-    // Reindex the node when it is updated. The node is automatically indexed
-    // when it is added, simply by being added to the node table.
-    if ($update) {
+    // Reindex the node when it is updated, but only if it iss the default
+    // revision. The node is automatically indexed when it is added, simply by
+    // being added to the node table.
+    if ($update && $this->isDefaultRevision()) {
       node_reindex_node_search($this->id());
     }
   }