Mobile Sticky Navigation - can't make it work! :/

Hi guys! Here is the website I'm building: https://social-brain.it.

I created this landing page using Generate Press and Elementor. With Elementor I made everything you can find below the navigation bar, excluding the copyright footer. The navigation bar, instead, it's managed using exclusively Generate Press.

The problem is: I really can't make sticky navigation work on mobile devices.

In Dashboard->Appearance->Customize->Layout->Sticky Navigations I've set things this way:

- Sticky Navigation: Mobile Only
- Sticky Navigation Transition: Fade
- Hide when scrolling down: Disabled
- Menu item height:20 px

I need the sticky navigation to be slide-out, so in Customize > Layout > Slide-out Navigation I've set things this way:

- Slideout Navigation: Mobile Only
- Item Height: 80 px

Something more: when I tried to set "Sticky Navigation" to "Both" I've seen that it makes nav woek perfectly on Desktop, but anyway doesn't work on tablet and phones.