Problem when using two quizzes in same page

Hello,

I am having a problem in a page at my website that when I try to use two QSM quizzes, one of them works and the other one tries to skip questions when clicking “Next” (it doesn’t skip because answering is required).

Also, when I use two quizzes, the progress bar and “Send” button at the end of both quizzes doesn’t appear.
If I delete one of them, and only use one quiz in the page, everything goes back to normal.

I am using the latest version of the QSM plugin and the Ivory Theme.
The link to the page is: https://qexpert.com.br/teste-de-dados/

Any suggestions on how to fix this?

The page I need help with: [log in to see the link]