Reply To: Supermag – Post Page Navbar Issue

We think we finally understand your problem, This is because the post have many categories and you use that categories in the navigation. Please use following custom CSS

header-wrapper .menu > li.current-menu-parent a::before {
background: #fff;
}
.header-main-menu .acmethemes-nav ul li.current-menu-parent a {
background: #2D2D2D;
}

Thanks