Responsive columnsnot working

On my site (https://www.lekkerengoedkoop.eu/) the columns keep appearing next to one another on mobile, whatever I do.

I’ve deactivated all plugins, updated everything, no change. When I switch from Phlox to Twenty Twenty-one the columns appear correct in mobile view. Switching back to Phlox or the Phlox Child theme they are next to one another.

The weirdest thing about this is that I have two other sites running with Phlox where the columns show correct behaviour: https://www.electricguitardiy.eu/ and https://www.dojokatsu.nl/. But as I deactivated all plugins on https://www.lekkerengoedkoop.eu/ and compared all settings in the Customizer and Elementor I fail to see the difference that causes my problem. I’ve spent a lot of time checking code with the inspector in Firefox as well. In CHrome and Opera the problem is the same.

I’ve been searching for a solution for a few days now, just spent three hours comparing the code for the sites, no result. Shoot me 🙁

• This topic was modified 5 years, 1 month ago by rinzer.

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