Link in search results not working, links back to the same search results.

Hi,
I have a site with a list of charity and support resources stored in a PODS database.
This database can only be viewed by logged in users.
The list of resources is working file, but when I click a link it just “loops” back to the search results, rather than the detail of the entry.
Here is what is the item list has:
https://www.website.co.uk/directory/by_alphabet/A
The “Detail Page URL” is set to: /directory/listing/{@id}/

This used to work fine, not sure when it stopped.

Can anyone help point me in the rignt direction?

Cheers

Paul