Meta Box

Yes, I'm using an image field which works on Desktop but doesn't works on mobile devices.
Here is the code: ( but I'm using the Metabox Builder )

add_filter( 'rwmb_meta_boxes', 'your_prefix_register_meta_boxes' );

function your_prefix_register_meta_boxes( $meta_boxes ) {
    $prefix = '';

    $meta_boxes[] = array (
        'title' => esc_html__( 'Ihre Haustiere', 'text-domain' ),
        'id' => 'haustiere',
        'fields' => array(
            array (
                'id' => $prefix . 'customer_pets',
                'type' => 'group',
                'name' => esc_html__( 'Ihre Haustiere', 'text-domain' ),
                'fields' => array(
                    array (
                        'id' => $prefix . 'pet_image',
                        'type' => 'image',
                        'name' => esc_html__( 'Bild', 'text-domain' ),
                        'force_delete' => 1,
                        'max_file_uploads' => 1,
                        'columns' => 4,
                    ),
                    ...
                ),
                'clone' => 1,
                'default_state' => 'expanded',
                'columns' => 12,
            ),
        ),
        'type' => 'user',
    );

    return $meta_boxes;
}

Hey, thanks for your answer (:

How would this route look like and the function behind the route?

Thanks