Thanks Amit. We have updated to the latest theme version and this appears to have fixed the issue.
Thanks for letting me know.
We also installed a Comments plug in – however the issue with random Name/Email/URL text wasn’t resolved by this as the offending text still appeared above the plug-in Comments Box.
We therefore created a child theme using instructions and code from this link:
https://docs.themeisle.com/article/14-how-to-create-a-child-theme
We then copied the oceanwp_modify_comment_form_fields function into the child functions.php file and set the esc_attr_e to be blank (”) for the three fields.