Jetpack Infinite scroll on mobile

Hi,
I’m using Jetpack with Infinite scroll enabled on my blog, blog.zeronea.com. On Desktop/PC it works fine but when using on mobile (iPhone), it starts showing navigation buttons (i.e. Infinite Scroll doesn’t work).

It is not because of plugins I used. Verified by removing all plugins and enabling one by one. When I removed all widgets, Infinite scroll works but even 1 widget added on sidebar breaks it. I’m not using any third path widget and all are standard provided by WordPress and no footer widget. I’m using Twenty Fourteen theme.