Footer only appears in the plaintext portion of an HTML email

I’ve got a campaign which sends out HTML emails. As you can see, it has a footer set:

The message is

<h1><a href="[URL]">[TITLE]</a></h1>
[CONTENT]

When messages are sent, the footer only appears in the plaintext portion of the email:

Scrolling to the bottom of the HTML reveals no footer:

I’ve tried changing the message to be

<h1><a href="[URL]">[TITLE]</a></h1>
[CONTENT]
[FOOTER]

But that just literally printed [FOOTER]

I have a default footer set in the config:

From reading the documentation, this should work. Can someone please let me know what I’m doing wrong? Thanks!

@edent The HTML format email doesn’t have the “powered by phplist” statement either. Does that appear in the plain text version?

Are you using a template, selected on the Format tab when composing the campaign?