Mobile menu bugged with anchor link

Hello,
i am having an issue with mobile menu.
I made this website with a long vertical homepage and some anchor link on the menu in the header.
It works like a charm in desktop mode but when the menu collapse (like in mobile), menu does not work.
I can’t see any error in the console and WordPress is last version with a very few of plugin installed but also disabling them it does not work.

Any idea or workaround?

Thanks!

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