Details page white with email

Hi
I have a problem similar to the one discussed here:
https://wpgeodirectory.com/support/topic/contact-email-link-breaks-gd-listing-page/

As far as I can ascertain, it affects only one listing, which is mystifying in itself:

https://myschooladvisor.com.au/schools/australia/australian-capital-territory/campbell/catholic/st-thomas-mores-primary-campbell/

This school, when clicked from the front page link (for “featured” listings) or from the search page, it shows only a white page with the email in the top left corner.

It is related to caching as it is not a problem when I am logged in.

I can clear cache and the link will work once.

Since every other listing behaves normally, I don’t think I can fix this from the swiftpro caching plugin. It does not work to exclude the school URL from caching in the swift plugin.

I have tried to change the URL by adding -campbell at the end. Worked once because it cleared the cache so not a URL issue.

Any pointers what I can try?

Thanks
Lise