At the minute, the standard for the mobile menu, is static. So as you scroll down a page, it stays up top, and the navigation disappears. I believe that this should be made available to be fixed top, without adding extra code.
At the minute, I have to add css, and javascript code that semi-works. (the java scripts works, but when you have multiple scroll to’s on the same page, the menu doesn’t retract, you can see this issue on this post: Problem with mobile menu)
The menu should also collapse on clicking, so it doesn’t hide the screen behind it.
Thanks!