Tap status bar to scroll to top in Safari doesn't work

[lrobson555]

On most websites when viewing on Safari on iOS 10.3.1, as you scroll down a page the Safari status URL reduces in height and when you double tap it, it scrolls to the top of the page.

However, when using Pushy on a site, this feature no longer works.
I think it might be something to do with the -webkit-overflow-scrolling:touch; CSS property. As explained here - http://stackoverflow.com/questions/14868053/webkit-overflow-scrollingtouch-and-tap-status-bar-to-scroll-to-top

Can this be fixed?