Garfunkel theme & infinite scroll

I installed Jetpack and enabled the infinite scroll option on a test page https://www.kamila.cc using the Garfunkel theme.

The infinite scroll works very well for a big browser width and the three column layout.

However, when I shrink the browser width or open the page on a mobile device, so that there are only one or two columns of posts, the infinite scroll doesn’t work. It leaves enough space for the posts at the bottom of the page, but doesn’t show them.

I tried it with the actual Safari, Chrome and Safari Mobile.