I want to report another problem. After I've enabled a page refresh, and 1 question per page, I noticed, that the quiz becomes cached even for other users. And when somebody tries to pass a quiz, he answers 1 question, and instead of next question, the result is shown (with answers already checked - made by other user, or the same user). This didn't happen, when I used all questions on the same page, and without page reload.

I was able to find the solution: I've excluded the quiz page from being cached, and everything works fine. However, I don't want to disable cache for such quizzes.

Is there any other way to solve the problem?

Could you specify which cache plugin is used?

Regards,
ARI Soft

WP Fastest Cache. Is there any way, how you can fix the problem?