Problems with portfolio on iOS

Hi,

I’ve set up a website using the “Minimal Portfolio” theme, which includes the “Filterable Portfolio” plugin. Unfortunately, the portfolio doesn’t work properly on iOS devices. The portfolio works fine on a desktop and on Android devices. But when using an iPhone the images aren’t clickable, and the headlines and “Details” button don’t show.

A strange thing is that it works fine when I’m logged in as an WP administrator, but when visiting the site as a regular visitor, it doesn’t work.

Any suggestions on how to solve this would be greatly appreciated!

/K

The page I need help with: [log in to see the link]