Lightbox not working on touch screen devices

Hi there,

The click to zoom/expand feature that opens the image in a lightbox isn’t working on touch screen devices. I’ve tested this on Chrome and Safari with iPad and iPhone – I can’t see any errors as such, it seems more like something preventing the click from happening but I can’t get to the bottom of it.

Do you have any ideas on what this could be or do you have a demo so I can compare it with my own work?

Thank you