Thanks for your input, I also hope the wpForo development team find it useful. Can we have a reponse from that team please, or a moderator in contac...

Happy to send the example URL where this issue has been identified but our security policy may not allow third party testing on the production site. H...

So, I just came across the answer to this myself, it's a notification sent by the Forums Censure plugin, although it's still not clear to me why...