I think the pathname changes when you in a child page. What can be done is add the active state to the child pages

This might be the intended functionality.

But, if we wanted to change it to include the subitems too, we can change Navigation.tsx:

let isActiveGroup = group.links.findIndex((link) => link.href === pathname) !== -1

This is how the current tab is selected, we can use includes instead of === or something like that.