Then it is the same version on both sites, which makes it even stranger. I could create a debug version of Article Footer to try and find out what is going on, as it seems to be specific to your site. I have just had another play with JEvents settings, but still can't get the footer to show.
Is there any chance you'd be able to either set up a test site that is a copy of yours, or take a backup of the site for me to set up as a test site (removing any user-accounts or anything else, of course)? I'm not sure how to progress this without being able to replicate the issue.