Banner Image Not Displaying On Mobile

Banner images are not showing up on the mobile version of my website. Rather than a banner image, on mobile there is just a background color and site logo. To see an example of this see www.savoryalaska.com/our-story on desktop vs mobile. 

You can use this code to Website > Website Tools > Custom CSS

@media screen and (max-width:640px) {
body#collection-5bf1dd7e4fa51adec12f7a12 section.Intro.Intro--has-image {
    height: 300px !important;
}
}