Hey On3w,
this is odd – the same thing does work in the theme demo (try pressing on a portfolio item and then on a menu item) – and any other Kanso-based website that I’ve tested. Let’s troubleshoot – firstly, could you please try disabling all third-party plugins (i.e. those that did not come with the theme) one by one and refreshing the page / retrying the menu links from a project page each time you disable a plugin. Please let me know of the result.
Sincerely,
Andrii / Satori Studio