I'm using T4 framework blank template and Yootheme Zoo.
When using J3, I have a layout for the Zoo Frontpage overview page and use a Subpage Layout to define a different layout style for the articles (clickthough items) for a Zoo Case Studies section.
All works fine under J3, but after making a test upgrade to J4, the clickthrough articles in Zoo have stopped using the Subpage layout (defined in the layout settings section of the template) and only use the Main Layout.
On the live (Joomla 3) site an example of a clickthough article is
https://www.immersa.co.uk/residential-case-studies/energise-barnsley-case-study
On the test (Joomla 4) site the same example page is
http://immersat4.com.185-197-62-61.hostaw.co.uk/residential-case-studies/energise-barnsley-case-study
Any thoughts on what the issue might be?