I found that it is hard to scroll down on the testimonials portion when you are on mobile. Your down swipe wants to switch the testimonial left or right. I have used other sites where that didn’t seem to be an issue…so maybe look into that for your next release…great theme though!!!
I just tried it on my end and it works fine on an actual iPhone6 device. What device were you using? Take a look at the screencap below for reference. It’s using chrome’s dev tool so you can see the point where I’m tapping/holding.
Do you think you can share the URL of the site in question to we can take a look?