[Bug] Input format configuration for "date" fields not working as expected.

[datgausaigon]

My Environment:

• PHP: 8.2.x
• WordPress: 6.8.1 (Blank Site)
• Theme: Twenty Twenty-Five 1.2
• Carbon Fields: 3.6.8

My code:

use Carbon_Fields\Container;
use Carbon_Fields\Field;


add_action( 'admin_enqueue_scripts', function () {
	wp_enqueue_script( 'flatpickr-locale-vn', 'https://npmcdn.com/flatpickr/dist/l10n/vn.js',
		[ 'carbon-fields-core' ] );
}, 10000 );

add_action( 'carbon_fields_register_fields', 'crb_add_event_fields' );
function crb_add_event_fields(): void {
	$event_category = get_term_by( 'slug', 'event', 'category' );

	if ( $event_category ) {
		Container::make( 'post_meta', 'Event Details' )
		         ->where( 'post_type', '=', 'post' )
		         ->where( 'post_term', '=', [
			         'field'            => 'term_id',
			         'value'            => $event_category->term_id,
			         'taxonomy'         => 'category',
			         'include_children' => true
		         ] )
		         ->add_fields( [
			         Field::make( 'date', 'crb_event_date', 'Event Date' )
			              ->set_attribute( 'placeholder', __( 'Event Date' ) )
			              ->set_picker_options( [
				              'dateFormat' => 'Y/m/d',
				              'locale'     => 'vn',
			              ] )
			              ->set_input_format( 'Y/m/d', 'Y/m/d' )
			              ->set_storage_format( 'Y-m-d' )
			              ->set_required( false ),

			         Field::make( 'text', 'crb_event_location', 'Event Location' )
			              ->set_attribute( 'placeholder', __( 'Event Location' ) )
			              ->set_required( false )
		         ] );
	}

What I expect is that the input (and display) in admin for "date" field should be y/m/d as my source code. But "date" field only allows input (and display) according to "locale", if locale is default then it will be (M/d/y), if it is "vn" then it will be (d/M/y). Please see my attached screenshot.

With default "locale":

With "vn" "locale":

Is it because my code is not correct? If not, can you help me?

Thanks
🐻