ISSUE ON MOBILE PORTRAIT

Just trying this out on a test site.

I have added an image using Elementor (set to cover both in Elemetor and in Vision settings) and it works fine on all devices, except on an Android portrait view (fine in landscape). The whole page shrinks (including nav), leaving a white bar on the right.
Haven’t tried setting CSS id/class, although surprised if it would change anything. Initially, using Chrome development tools emulator for Iphone 6 I got the same issue, but seems ok without any intervention.

Any ideas?

Many thanks.

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