Hello @rilwis
I checked it in several browsers:
Chrome: https://prnt.sc/kN1l_ZpCRRzg
Edge: https://prnt.sc/SKeq1NSqHeTl
Firefox: https://prnt.sc/dMdYnU3QndPm
you can try to check it with this code
add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );
function your_prefix_register_meta_boxes( $meta_boxes )
{
$prefix = 'dat_';
$meta_boxes[] = array(
'id' => 'series',
'title' => __( 'Info', 'meta-box' ),
'pages' => array( 'post' ),
'context' => 'normal',
'priority' => 'high',
'autosave' => true,
'fields' => array(
array(
'name' => __( 'Date', 'meta-box' ),
'id' => "{$prefix}release",
'desc' => __( 'input release date', 'meta-box' ),
'type' => 'date',
'js_options' => array(
'appendText' => __( '(M dd, yyyy)', 'meta-box' ),
'dateFormat' => __( 'M dd, yy', 'meta-box' ),
'changeMonth' => true,
'changeYear' => true,
'showButtonPanel' => true,
),
),
)
);
return $meta_boxes;
}