Bug - file_advanced field does not validate if file is removed via media library

Hi there,
discovered a minor bug involving the 'Conditional Logic' and 'Validation' which I hope you might fix for a future release.

Steps to recreate:

1) Add the following custom fields:

add_filter( 'rwmb_meta_boxes', 'register_meta_boxes_details' );

function register_meta_boxes_details( $meta_boxes ) {
    $prefix = 'prefix_';

    $meta_boxes[] = [
		'validation' => [
			// RULES
			'rules'  => [
				$prefix . 'file_download' => [
					'required'  => '#prefix_download_visibility:checked',
				],
			],
			// MESSAGES 
			'messages' => [
				$prefix . 'file_download' => [
					'required'  => esc_html__( 'You must add/upload a PDF file when the download form is being shown!', 'text_domain' ),
				],
			],
		],
        'title'   => esc_html__( 'Details', 'text_domain' ),
        'post_types' => 'custom_post_type',
        'id'      => 'some_identifier',
        'context' => 'normal',
        'fields'  => [
			[
				'type' => 'switch',
				'name' => esc_html__( 'Show Download', 'text_domain' ),
				'id'   => $prefix . 'download_visibility',
				'desc'       => esc_html__( 'Add downloadable content (EG: A Whitepaper).', 'text_domain' ),
				'style'     => 'square',
				'on_label'  => 'Show',
				'off_label' => 'Hide',
			],
			[
				'type'             => 'file_advanced',
				'name'             =>  esc_html__( 'PDF Download', 'text_domain' ),
				'desc'             => esc_html__( 'Add a PDF file to be downloaded by the user.', 'text_domain' ),
				'id'               => $prefix . 'file_download',
				'force_delete'     => false,
				'max_file_uploads' => 1,
				'mime_type'        => 'application/pdf',
				'max_status'       => true,
				'visible'     => ['prefix_download_visibility', 1],
			],
			
        ],
    ];

    return $meta_boxes;
}

2) Toggle the 'Switch' to "Show" (In your custom post type). The file_advance field will be available.
3) Add/Upload a PDF file.
4) Publish/Update the post.
5) Delete the PDF you have just uploaded *IMPORTANT* via the "Media Library".
6) Return to the post (Where you originally uploaded the PDF file. Which will now be missing) and the toggle switch will still be on.
7) Click "Update" and the Validation no longer works to check if there is a PDF file attached to the 'file_advanced' field.

* Removing the uploaded file (as in step 5 inline with the field within the post) does NOT create this problem.

Cheers 🙂