Issue with Call to Action image on iOS mobile

Hi!

Hoping someone might be able to advise how to fix an issue I’m having. I’m not sure if it’s being caused by my own settings or an issue with the theme itself.

I am currently working on a site for someone and in my Call to Action section on the homepage (http://www.divirge.com/hartacres/) I have a background image that looks great on desktop – however for some reason on iOS mobile, the way the image crops/fills the space is very abstract and distorted.

Here is a screenshot of the issue on iOS – http://www.divirge.com/hartacres/wp-content/uploads/2016/05/hartacres_iOS.jpg

And here is a screenshot of the site on Android mobile which looks perfect – http://www.divirge.com/hartacres/wp-content/uploads/2016/05/hartacres_android.jpg

I’ve tried every different position setting for the call to action button but no combination within the theme options provides the perfect desktop parallax as well as appropriate cropping on iOS (only on Android).

Please help! 🙂