CPT Archive - Page Header/Content Elements Not Loading

I've been working on a subdomain to redesign my site using GeneratePress. Now, I've moved everything across onto the main domain ready to go live with the new design. But I've come across a bizarre error with one of my CPT archive pages: Managers.

Here is the archive page on the dev subdomain:
https://new.boroguide.co.uk/managers/

Here is the archive page on the main domain:
https://www.boroguide.co.uk/managers/

As you might notice when logged in (credentials provided), the subdomain version is pulling in five elements (correctly) – but this is not the case on the main domain, where it is reverting to the global Page Header and omits the Page Content hook.

I cannot figure out why this is. The archive page uses the same file, the elements have all been imported like-for-like, and this is the only CPT archive page where I'm having this issue. What am I missing? Why isn't the main domain /managers/ page pulling the correct Elements?