Hi Michael
I dont think I am doing anything special for the pagination
I use Elementor Hello Theme & Elementor pro page builder & have created a single post template with the elementor post navigation element. I have used this feature with custom fields before and it has worked fine.
I am using the same elements on my blog posts and it works well – The difference being it is not a custom post type or taxonomy.
http://www.acbuild.penguinwolf.com/the-actors-joy-and-delight/
The only thing I can think that I have done differently this time compared to other sites is that I imported all the student pages via excel spreadsheet.
Any ideas of things I could try?