reverted:
--- b/core/modules/comment/src/Entity/Comment.php
+++ a/core/modules/comment/src/Entity/Comment.php
@@ -339,7 +339,7 @@
    * {@inheritdoc}
    */
   public function hasParentComment() {
+    return (bool) $this->get('pid')->target_id;
-    return (bool) $this->get('pid')->target_id && !empty($this->get('pid')->entity);
   }
 
   /**