When I'm logged in to admin and I view the post on the frontend the banner is displayed as expected.
When I'm not logged in and I view the post the banner is not displayed. There is no code being shown.
If I change the field value to some text it does display on the frontend, it's just the code that doesn't get rendered.
I've also tried it with a single line field and the same thing happens.
Link to a page where the issue can be seen: hidden link
Just below the "Ratings" section is a grey bar where the banner should appear.