Focus item. The form is reloaded

Your software
My Mautic version is: 3.3.2
My PHP version is: 7.4
My Database type and version is: mariaDB 10.4

Your problem
My problem is:
I have created a focus item, actually a classic newsletter form for a site.
I have set to engage upon arrival and stop engaging after a conversion.
The problem is that when I visit the page, type my email and press the subscribe button, pop up doesn’t close. The mail is accepted but the form is reloaded. I must press close button.