When I submit a comment on an AMP page on my website, for example: https://th.cnx-software.com/2021/07/02/venice-gw7100-sbc-gigabit-ethernet-mpcie/amp/ It shows "It appears your submission was successful. Even though the server responded OK" followed by a link to https://amp-wp.org/documentation/playbooks/handling-form-submissions/

But the comment does not make it through. Any ideas what may cause this? I can provide a dashboard login if necessary.