diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/cache/CachePluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/cache/CachePluginBase.php
index a8abdbd..c26542f 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/cache/CachePluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/cache/CachePluginBase.php
@@ -137,7 +137,7 @@ public function cacheSet($type) {
   }
 
   /**
-   * Prepare the view result before putting it into cache.
+   * Prepares the view result before putting it into cache.
    *
    * @param \Drupal\views\ResultRow[] $result
    *   The result containing loaded entities.
@@ -147,6 +147,8 @@ public function cacheSet($type) {
    */
   protected function prepareViewResult(array $result) {
     $return = array();
+    // Clone each row object and remove any loaded entities, to keep the
+    // original result rows intact.
     foreach ($result as $key => $row) {
       $clone = clone $row;
       unset($clone->_entity, $clone->_relationship_entities);