Navigation goes over popup in mobile


in our site we are using embedded custom code for our booking calendar widget in our experiences page. Everything works well in desktop, but when you are in mobile and use the booking calendar to go check out. The site breaks and navigation stays over the pop up.

To experience this issue open our experiences page in mobile and add product to the cart and go to check out.

I can’t really figure out how the fix the issue. Any help?

Thank you!

Here is my site Read-Only: (Webflow -