Pagination permalink issues for custom post type

Hi there,

Really scratching my head about this so hope you can help guys.
Looks here:
http://paula.showcaseserver.eu/books/
But then look here:
http://paula.showcaseserver.eu/books/page/2/

I can see that (at least I think) that Wordpress is using this from the permalink:
?name=books&paged=2

But it should be using:
?post_type=books&paged=2

I just can't figure out why / fix it.

Custom post type created using WP Toolset Types.
And I have tried changing to 2016 theme - same problem.

If I turn off permalinks... the query in the URL is correct and works. So it really seems to be how WP is interpretting the CPT archives when paginated.

Many thanks in advance! :slight_smile:
Paul