This post has Tips for Working with Lightboxes
And this link to the API docs shows how to pass data to the lightbox
Will passing the data this way work in your scenario?
As for my curiosity, if I have a chance later I will try to recreate your issue to see if I notice anything. Can you tell me the exact steps you used to set up your lightbox image so i know i’m testing the same thing? Even which lightbox template you dragged onto the page, etc
And to clarify you only see this issue on an actual mobile device, not in the mobile editor on the website?