gh-navigation-menu hidden with JS disabled

[hyperknot]

There is this CSS:

@media (min-width: 768px) {
    .gh-navigation:not(.is-dropdown-loaded) .gh-navigation-menu .nav>li {
        opacity: 0;
    }
}

which hides/disables the nav menu when JS is disabled. This effects all websites, even those with no dropdown usage.