It sounds like you enabled WP Pagination? Is there a reason you need to use this feature instead of the regular pagination feature?
In case you don’t know, WP Pagination can be found under the Quiz Settings Advanced tab, and forces new pages. As that feature’s description states, it’s also not something I recommend using except in specific circumstances and instead
“It is recommended to use the “paginate” option on each question instead.”
If you disable WP Pagination again and edit a question, under the “Extra” tab you will see an option to Paginate: “user will need to select “next” to see this question or ones below it”. The advantage of doing it this way is that all questions load on the same page, but the ones that have Paginate enabled are hidden behind the “next” button.
This way when a user clicks on next, instead of a brand new page loading, the old questions hide, the new ones become visible, and the site automatically scrolls to the next available question.
If I misunderstood the question, just let me know and I’ll help you with some other options you may have.