https://www.joomlart.com/forums/topic/mobile-display-vibrates-when-reaching-bottom-of-page/

We have found that the template seems to vibrate when the user scrolls to the bottom of the page. the page vibrates for a second or two then stops. This is only on mobile devices. On desktop it is fine.
http://www.activestart.org/index.php/about
All pages using the default template style. Features template stye not affect

Any ideas how to stop this from happening?
https://www.joomlart.com/forums/topic/mobile-display-vibrates-when-reaching-bottom-of-page/