diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
index 065310c..daffebe 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
@@ -45,7 +45,7 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
    */
   public function isEmpty() {
     $value = $this->get('value')->getValue();
-    return $value === NULL || $value === '';
+    return $value === NULL;// || $value === '';
   }
 
 }