To further this, the product item image options in the product items editor have no effect on what happens on mobile. No matter what you select it will always display as the broken carousel mentioned above.
The second part of the issue is that the 'Mobile preview' does not actually have any bearing on what the site looks like on an actual mobile browser. For instance I have Lightbox selected but on mobile safari on my iPhone tapping on an image does absolutely nothing. I am having real issues with image cropping and a different display option than carousel on mobile would probably allevi