Steps to reproduce:

1. Create a file under templates folder called override.html.twig with the following content:

   {% extends '@ibexadesign/content/form_fields.html.twig' %}
    
   {% block form_row_fieldtype %}
   OVERRIDE
   {% endblock %}
   

1. Edit ibexa.yaml and add under system.admin_group parameter:

               admin_ui_forms:
                   content_edit_form_templates:
                       - { template: 'override.html.twig', priority: -10 }
   

1. Edit any Folder Content, observe the form override.
2. Edit any Landing Page Content, go to the form with Name and Description in the Page Builder.

Result:
The form is not overridden. It looks exactly the same as before.

Expected result:
You should see the "OVERRIDE" string.