problem accessing _shipping_state

Hello

I have create this code

add_filter( 'woocommerce_states', 'custom_woocommerce_states' );
 
function custom_woocommerce_states( $states ) {
  $states['CU'] = array(
    'Pinar del Rio' => 'Pinar del Rio',
    'Artemisa' => 'Artemisa',
    'Mayabeque' => 'Mayabeque'
    );
 
  return $states;
}

function custom_places_cuba($states) {  

  global $states;	
	
  $places['CU']['Pinar del Rio']['PR1'] = 'Consolacion del Sur';
  $places['CU']['Pinar del Rio']['PR2'] = 'Los Palacios';
  $places['CU']['Pinar del Rio']['PR3'] = 'Guane';
  $places['CU']['Pinar del Rio']['PR4'] = 'San Luis';
  $places['CU']['Pinar del Rio']['PR5'] = 'Vinales';
  $places['CU']['Pinar del Rio']['PR6'] = 'Pinar del Rio';
  $places['CU']['Pinar del Rio']['PR7'] = 'San Juan y Martinez';
  $places['CU']['Pinar del Rio']['PR8'] = 'Sandino';
  $places['CU']['Pinar del Rio']['PR9'] = 'La Palma';
  $places['CU']['Pinar del Rio']['PR10'] = 'Minas de Matahambre';
  $places['CU']['Pinar del Rio']['PR11'] = 'Mantua';
  
  $places['CU']['Artemisa']['VE16'] = 'Alquizar';
  $places['CU']['Artemisa']['VE17'] = 'Artemisa';
  $places['CU']['Artemisa']['VE18'] = 'Bahia Honda';
  $places['CU']['Artemisa']['VE19'] = 'Bauta';
  $places['CU']['Artemisa']['VE20'] = 'Caimito';
  $places['CU']['Artemisa']['VE21'] = 'Candelaria';
  $places['CU']['Artemisa']['VE22'] = 'Guanajay';
  $places['CU']['Artemisa']['VE23'] = 'Guira de Melena';
  $places['CU']['Artemisa']['VE24'] = 'Mariel';
  $places['CU']['Artemisa']['VE25'] = 'San Antonio de los Banos';
  $places['CU']['Artemisa']['VE26'] = 'San Cristobal';	
  
  $places['CU']['Mayabeque']['VE27'] = 'Batabano';
  $places['CU']['Mayabeque']['VE28'] = 'Bejucal';
  $places['CU']['Mayabeque']['VE37'] = 'Guines';
  $places['CU']['Mayabeque']['VE29'] = 'Jaruco';
  $places['CU']['Mayabeque']['VE30'] = 'Madruga';
  $places['CU']['Mayabeque']['VE31'] = 'Melena del Sur';
  $places['CU']['Mayabeque']['VE32'] = 'Nueva Paz';
  $places['CU']['Mayabeque']['VE33'] = 'Quivican';
  $places['CU']['Mayabeque']['VE34'] = 'San Jose de las Lajas';
  $places['CU']['Mayabeque']['VE35'] = 'San Nicolas de Bari';
  $places['CU']['Mayabeque']['VE36'] = 'Santa Cruz del Norte'; 

  return $places['CU'];
}

add_filter('scpwoo_custom_places_cu', 'custom_places_cuba' );

In the checkout form when I try to access the _shipping_state the woocommerce returns the _billing_state

add_action(‘woocommerce_review_order_before_submit’, ‘add_my_checkout_tickbox’, 9);

function add_my_checkout_tickbox() {
$shipping_state = WC()->customer->get_shipping_state();
echo $shipping_state;
}

woocommerce returns the _billing_state instead of one of the state created

The shipping contry is cuba, the state dropdown and cities dropdown are show correctly, but I can not get the right value by code.

Thanks

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