I sent my first client gallery to a model, and she was having difficulty making selections because the heart icon in the thumbnail was not showing up. I thought it might be just her phone, but, sure enough, I had the same problem on my iPhone 7 with its small screen.
I started looking here for a solution, but then I decided to see if allowing my phone to switch to landscape orientation would help, and voila!, it worked. I did not see/don’t remember any mention of that in the documentation. Is there something I should have attended to in the setup process to avoid the issue in the future?
My current workaround:
Showing CRG in 3 columns to force the customer to tap on the image.
That way the customer gets fullscreen and voila, hopefully finds the little “heart” to mark the photo.