quiz hangs when visting page in menu and then return to the quiz

Hello and thank you for reading my problem.

I made a quiz with 6 images. The user hears an audio fragment and must choose the right image.

After clicking the image, the image will submit the interaction and the user will see a new layer with the information if it is right or wrong.

On the same layer is a button to go to the next slide. It works perfectly but if the user goes into the menu and goes to a page outside the quiz and then returns to the quiz then the quiz hangs.

Somebody has a solution?

regards Alan