Variables removed from url?

That is very unlikely. There’s no code in All in One SEO Pack on the front end that can do a redirect.

To troubleshoot and narrow down a possible plugin/theme conflict, disable all other plugins and switch to the default theme. With only All in One SEO Pack enabled (and the default theme), try again.

https://semperplugins.com/documentation/how-to-troubleshoot-issues-with-all-in-one-seo-pack/

Once you’ve done this, report back the results, and we’ll go from there.

• This reply was modified 7 years, 3 months ago by Michael Torbert.

Ok, I disabled iThemes Security, but still have problem with titles..

Here is an English example: https://demo.djmimi.net/themes/reviews/search-page/?review-category=car-players
Title: Car Players – Search Page – Reviews

If All in One is enabled, there is only: Search Page – Reviews
without phrase ‘Car Players’ ??

In functions.php I found this code:

if( !function_exists('reviews_wp_title') ){
function reviews_wp_title( $title, $sep ) {
	global $paged, $page, $reviews_slugs;

	if ( is_feed() ){
		return $title;
	}

	if( !empty( $_GET[$reviews_slugs['keyword']] ) ){
		$title = $_GET[$reviews_slugs['keyword']]." $sep ".$title;
	}

	if( !empty( $_GET[$reviews_slugs['review-category']] ) ){
		$term = get_term_by( 'slug', $_GET[$reviews_slugs['review-category']], 'review-category' );
		$title = $term->name." $sep ".$title;
	}

	if( !empty( $_GET[$reviews_slugs['review-tag']] ) ){
		$term = get_term_by( 'slug', $_GET[$reviews_slugs['review-tag']], 'review-tag' );
		$title = $term->name." $sep ".$title;
	}

	return $title;
}
add_filter( 'wp_title', 'reviews_wp_title', 10, 2 );
}

if( !function_exists('reviews_wp_title_new') ){
function reviews_wp_title_new( $title ) {
	global $reviews_slugs;
	if( !empty( $_GET[$reviews_slugs['keyword']] ) ){
		$title['title'] = $_GET[$reviews_slugs['keyword']]." - ".$title['title'];
	}

	if( !empty( $_GET[$reviews_slugs['review-category']] ) ){
		$term = get_term_by( 'slug', $_GET[$reviews_slugs['review-category']], 'review-category' );
		$title['title'] = $term->name." - ".$title['title'];
	}

	if( !empty( $_GET[$reviews_slugs['review-tag']] ) ){
		$term = get_term_by( 'slug', $_GET[$reviews_slugs['review-tag']], 'review-tag' );
		$title['title'] = $term->name." - ".$title['title'];
	}

    return $title;
}
add_filter( 'document_title_parts', 'reviews_wp_title_new', 10, 1 );
}

if( !function_exists('reviews_wp_seo_title') ){
function reviews_wp_seo_title( $title ) {
	global $reviews_slugs;
	if( !empty( $_GET[$reviews_slugs['keyword']] ) ){
		$title = $_GET[$reviews_slugs['keyword']]." - ".$title;
	}

	if( !empty( $_GET[$reviews_slugs['review-category']] ) ){
		$term = get_term_by( 'slug', $_GET[$reviews_slugs['review-category']], 'review-category' );
		$title = $term->name." - ".$title;
	}

	if( !empty( $_GET[$reviews_slugs['review-tag']] ) ){
		$term = get_term_by( 'slug', $_GET[$reviews_slugs['review-tag']], 'review-tag' );
		$title = $term->name." - ".$title;
	}

    return $title;
}
add_filter( 'wpseo_title', 'reviews_wp_seo_title' );
}

I noticed that the titles are set in “document_title_parts” filter

You can find documentation on our title format settings here https://semperplugins.com/documentation/title-settings/

I know about this, but this theme has a custom search page

In that case you may want the title filter API hook https://semperplugins.com/documentation/aioseop_title/