Hey Alan,
please try switching to “Post name” url slug structure in the “Settings -> Permalinks” admin section – not only will this display the relevant parts of portfolio when clicking on icon menu items outside of the portfolio page (you’ll need to clear the “Link URL” field of each icon menu item in the Theme Options) – it will also make your URLs more semantic, which will in turn help both users and search engines orient themselves on your website.
Sincerely,
Andrii / Satori Studio