kamenskoe

For all who have a such problem. I find a correct solution.
Delete from functions.php this code:

if ( ! function_exists( 'wp_castle_wp_render_title_tag' ) ) {
	function wp_castle_render_title() {
?>
<title><?php wp_title( '', true, 'right' ); ?></title>
<?php
	}
	add_action( 'wp_head', 'wp_castle_render_title' );
}

Insert in header.php:
<title></title>

Thanks for support, guys 😉