How to move to next question automatically?

Hello

In your demo quizzes (for example, the cartoon quiz), when we select an answer, it shows the correct answer for one second then automatically moves to the next question. When I tried to do this in my quizzes, the user has to click on the “next” button to move forwards. After I deactivated the “next” and “back” button in the quiz settings, it moves forwards immediately, even though I set the “Display duration of right/wrong answers (in seconds)” to 4 seconds. I thought it means that the answer will be shown for 4 seconds before it moves to the next question. How can I make it move to the next question automatically after the person selects an answer?