Post Header Missing

Hi All – a bit of a mystery this one. I published a new post today and only noticed, some hours later that the post had no header. When I looked, the header is typed in where it should be, and is also there in the HTML/CSS code of the page.

Can anyone spot why the header is not visible, as I can’t!

The page in question is:

https://worldgeeklynews.com/films/80s-movie-challenge/80s-movie-challenge-week-4-the-lost-boys-1987/

And here’s an example of a post where the header is showing correctly – I honestly can’t see any difference, so I’m wondering if it’s something in the theme:

https://worldgeeklynews.com/films/80s-movie-challenge/80s-movie-challenge-week-1-robocop-1987/

The page I need help with: [log in to see the link]