Can't swipe up on slider at Catch Fullscreen Pro Theme

They there I use the theme "Catch Fullscreen Pro" and I just can't find the reason for the following problem: Using a slider and other sections on the start page, it all works fine on the desktop. But on any mobile device I just can't swipe up on the slider (whereas it works fine on any other section). Please check it out: http://5702711596392.hostingkunde.de (The images are quite jerky too on the slider on mobiles actually.) Any ideas?