Empty Comment Moderation emails – Spam?

I have been getting a bunch of Moderate Comments emails that are totally EMPTY, here is an example:

————
From: “[email protected]”
to me
show details
6:07 am (4 hours ago)

A new comment on the post # “” is waiting for your approval
https://chiagu.com/knotology/?p=

Author : (IP: , )
E-mail :
URI :
Whois : https://ws.arin.net/cgi-bin/whois.pl?queryinput=
Comment:

To approve this comment, visit: https://chiagu.com/knotology/wp-admin/post.php?action=mailapprovecomment&p=&comment=
To delete this comment, visit: https://chiagu.com/knotology/wp-admin/post.php?action=confirmdeletecomment&p=&comment=
Currently comments are waiting for approval. Please visit the moderation panel:
https://chiagu.com/knotology/wp-admin/moderation.php

———

When I go to the moderation panel there is NOTHING there. This morning I woke up to 7 of them, all came at 6am.

Is this a new form of spam or is something malfunctioning?

I tested my site and the comments do work, and the correct moderation email came through to my email.

Has anyone seen this before? I Googled to no avail.

Thanks in advance!