diff --git a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
index fc64fc2469..3b0a8ad8d9 100644
--- a/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
+++ b/core/modules/rest/src/Plugin/rest/resource/EntityResource.php
@@ -252,8 +252,7 @@ public function patch(EntityInterface $original_entity, EntityInterface $entity
         $original_entity->set($field_name, $field->getValue());
       }
     }
-
-    if ($entity instanceof ConfigEntityInterface && $original_entity instanceof ConfigEntityInterface) {
+    elseif ($entity instanceof ConfigEntityInterface && $original_entity instanceof ConfigEntityInterface) {
       foreach ($entity->_restSubmittedFields as $field_name) {
         $original_entity->set($field_name, $entity->get($field_name));
       }