Trigger country field change on address change click

assets/js/frontend/cart.js

@@ -180,6 +180,7 @@ jQuery( function( $ ) {
 		 */
 		toggle_shipping: function() {
 			$( '.shipping-calculator-form' ).slideToggle( 'slow' );
+			$( 'select.country_to_state, input.country_to_state' ).trigger( 'change' );
 			$( document.body ).trigger( 'country_to_state_changed' ); // Trigger select2 to load.
 			return false;
 		},