Custom Styles doesn’t work

Hello.
I would like to replace default formats styles with my custom styles. I add code to functions.php and I see this class names in dropdown format, but when I chose them, nothing happend – tags are not replaced. I don’t what is wrong. I check ‘create css classes menu’, I remove cached…thank you.
My code:

/* personalizacja TinyMCE WYSIWYG */
function wpb_mce_buttons_2($buttons) {
    array_unshift($buttons, 'styleselect');
    return $buttons;
}
add_filter('mce_buttons_2', 'wpb_mce_buttons_2');

/*
* Callback function to filter the MCE settings
*/
function my_mce_before_init_insert_formats( $init_array ) {  
 
// Define the style_formats array
 
    $style_formats = array(  
/*
* Each array child is a format with it's own settings
* Notice that each array has title, block, classes, and wrapper arguments
* Title is the label which will be visible in Formats menu
* Block defines whether it is a span, div, selector, or inline style
* Classes allows you to define CSS classes
* Wrapper whether or not to add a new block-level element around any selected elements
*/
        array(  
            'title' => 'Podtytu? do sekcji H4', 
            'block' => 'h4',  
            'classes' => 'podtytul-sekcji-h4',
            'wrapper' => true,
        ),  
        array(  
            'title' => '?ródtytu? do sekcji H5',  
            'block' => 'h5', 
            'classes' => 'srodtytul-sekcji-h5',
            'wrapper' => true,
        ),
        array(  
            'title' => 'Tytu? zdj?cia',  
            'block' => 'h6',
            'classes' => 'tytul-zdjecia',
            'wrapper' => true,
        ),
        array(  
            'title' => 'Tytu? tabelki',  
            'block' => 'h6',  
            'classes' => 'tytul-tabelki',
            'wrapper' => true,
        ),
        array(  
            'title' => '?ród?o',  
            'block' => 'h6',  
            'classes' => 'zrodlo',
            'wrapper' => true,
        ),
        array(  
            'title' => 'Tekst wyró?niony',  
            'block' => 'blockqoute',
            'classes' => 'tekst-wyrozniony',
            'wrapper' => true,
        ),
    );  
    // Insert the array, JSON ENCODED, into 'style_formats'
    $init_array['style_formats'] = json_encode( $style_formats );  
     
    return $init_array;  
   
} 
// Attach callback to 'tiny_mce_before_init' 
add_filter( 'tiny_mce_before_init', 'my_mce_before_init_insert_formats' );

// Add custom_editor_style to theme
function my_theme_add_editor_styles() {
    add_editor_style( 'css/custom-editor-style.css' );
}
add_action( 'init', 'my_theme_add_editor_styles' );