Select Advanced is not empty when cloned.

I have a "Group" that has a field type of "Post" that I amusing "Select Advanced". When I DO NOT have "Multiple" enabled everything works as expected. When I clone the group the field is empty.

When I have "Multiple" enabled and I clone the group the field has the last value that I had entered.

I believe this problem was discussed in 2016 "https://support.metabox.io/topic/select-advance-clone-issue/?swcfpc=1" and again in "https://support.metabox.io/topic/select-advance-clone-issue-2/?swcfpc=1".

I don't understand why the bug still exists in 2023, it should have been rolled out with any one of the many updates.

Here is the code:

<?php
add_filter( 'rwmb_meta_boxes', 'your_prefix_function_name' );

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

    $meta_boxes[] = [
        'title'      => __( 'Event', 'your-text-domain' ),
        'id'         => 'event',
        'post_types' => ['event'],
        'fields'     => [
            [
                'name' => __( 'Description', 'your-text-domain' ),
                'id'   => $prefix . 'description',
                'type' => 'wysiwyg',
            ],
            [
                'name'      => __( 'Location', 'your-text-domain' ),
                'id'        => $prefix . 'location',
                'type'      => 'post',
                'post_type' => ['location'],
            ],
            [
                'name'          => __( 'Schedule', 'your-text-domain' ),
                'id'            => $prefix . 'schedule',
                'type'          => 'group',
                'collapsible'   => true,
                'default_state' => 'collapsed',
                'group_title'   => '{schedule_item}',
                'clone'         => true,
                'sort_clone'    => true,
                'fields'        => [
                    [
                        'name'     => __( 'Schedule Item', 'your-text-domain' ),
                        'id'       => $prefix . 'schedule_item',
                        'type'     => 'text',
                        'required' => true,
                    ],
                    [
                        'name'        => __( 'Host', 'your-text-domain' ),
                        'id'          => $prefix . 'host',
                        'type'        => 'post',
                        'post_type'   => ['speaker'],
                        'field_type'  => 'select_advanced',
                        'multiple'    => true,
                        'placeholder' => __( 'Select Host', 'your-text-domain' ),
                    ],
                    [
                        'name' => __( 'Date', 'your-text-domain' ),
                        'id'   => $prefix . 'date',
                        'type' => 'date',
                    ],
                    [
                        'name'      => __( 'All Day', 'your-text-domain' ),
                        'id'        => $prefix . 'all_day',
                        'type'      => 'switch',
                        'style'     => 'rounded',
                        'on_label'  => 'Yes',
                        'off_label' => 'No',
                        'std'       => true,
                        'columns'   => 3,
                    ],
                    [
                        'name'    => __( 'Start Time', 'your-text-domain' ),
                        'id'      => $prefix . 'start_time',
                        'type'    => 'time',
                        'columns' => 4,
                        'hidden'  => [
                            'when'     => [['all_day', '=', true]],
                            'relation' => 'and',
                        ],
                    ],
                    [
                        'name'    => __( 'End Time', 'your-text-domain' ),
                        'id'      => $prefix . 'end_time',
                        'type'    => 'time',
                        'std'     => '{start_time}',
                        'columns' => 4,
                        'hidden'  => [
                            'when'     => [['all_day', '=', true]],
                            'relation' => 'or',
                        ],
                    ],
                ],
            ],
        ],
    ];

    return $meta_boxes;
}