I have an issue that I can see a Forum > Moderation alert, but when viewing the page it shows no post listed under Unapproved.

I assume this is because Akismet removed it but now have no way to remove it showing post pending for moderation. When checking entry in DB under "wp_wpforo_posts" it was confirmed as spam. In end removed it by editing DB directly as even when deleting the spammer's WP user account it didn't give option to transfer/delete content.