Theme Horse

So it does not show the home correctly

I’ll explain it better. In the home does not show the theme.

Your code hides the automatic title tag on the home page (in the source code), but it does not show the wp_portfolio theme, it shows the homepage as text without color, without formatting

I solved it so, in the file functions.php child I put this code that reverses the sequence: now it shows the motto and then the title of the blog, this is important for SEO

add_filter( 'pre_get_document_title', function( $title ) {

    if ( is_home() || is_front_page() ) {

        $title = get_bloginfo( 'description' ) .' | '.get_bloginfo( 'name' );
    }
     return $title;
}
);

I solved but not completely. In the page source shows correct, but in google search it’s not good. You can see.

https://albertifoto.it

add_filter( 'pre_get_document_title', function( $title ) {

    if ( is_home() || is_front_page() ) {

        $title = get_bloginfo( 'description' ) .' - Portfolio | '. get_bloginfo( 'name' );
    }
     return $title;
}
);