Hi I could not reproduce the issue by recreating the gallery on my server. I tried an iPad with iOS 10.3.2. Can you try smaller image size? Your pictures are over 3000 pixels wide and I don’t think there is a good reason to use images that big. Or you can give me an access information to your website via a private message. Since I can’t reproduce the problem on my server I can try to trouble shoot on yours. I can use a hidden post instead of changing any public post.