Problem with the “Mobile Menu”

Hello good morning, I have a problem with the mobile menu, when you access the page from any cell phone and click on the menu, it does not respond, I found that doing a little scrolling, and going back up, the menu works normally.

But I don’t think the user scrolls to see the menu.

I hope you can help me, thank you very much.

Here is the video

Excellent Theme by the way.

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