Issue #3470701 by lukasz.tyc: Webform TOC Submission Issue

Closes #3470701

src/Toc.php

@@ -530,7 +530,6 @@ class Toc implements TocInterface {
       /** @var \DOMElement $dom_node */
       if ($dom_node->getAttribute('name') && empty($dom_node->getAttribute('id'))) {
         $dom_node->setAttribute('id', $dom_node->getAttribute('name'));
-        $dom_node->removeAttribute('name');
       }
     }
   }