$jsontool and $escapetool does not escape < to allow safe usage in <script> tags on XWiki 16.10.11

Steps to reproduce

1. Start an instance of XWiki 16.10.11
2. Create a page with the following content:

   {{velocity}}{{html}}
   <script>$jsontool.serialize({
     'closeComment': '-->',
     'closeScript': '</script>',
     'openComment': '<!--',
     'openScript': '<script>'
   });
   '$escapetool.javascript('<!--')';
   </script>
   <h1>Success! 🎉</h1>
   {{/html}}{{/velocity}}

1. Save the page

Expected results

The text "Success! 🎉" is displayed on the page, the XWiki UI is normally displayed.

Actual results

Nothing is displayed on the page. Both Panels and footer is missing as well.

The issue could not be reproduced on XWiki 17.8.0 RC1, one of the Fix Versions of XCOMMONS-3410.