Populating ACF Select Fields with Post Type Values

populate_acf_select_fields

// populate acf field (sample_field) with post types (sample_post_type)

function acf_load_sample_field( $field ) {
    $field['choices'] = get_post_type_values( 'sample_post_type' );
    return $field;
}
add_filter( 'acf/load_field/name=sample_field', 'acf_load_sample_field' );

function get_post_type_values( $post_type ) {
    $values = array();
    $defaults = array(
                        'post_type' => $post_type,
                        'post_status' => 'publish',
                        'posts_per_page' => -1,
                        'orderby' => 'title',
                        'order' => 'ASC'
                    );
    $query = new WP_Query( $defaults );
    if ( $query->found_posts > 0 ) {
        foreach ( $query->posts as $post ) {
          $values[get_the_title( $post->ID )] = get_the_title( $post->ID );
        }
    }
    return $values;
}

nice snippet of code. Problem i have is it won't allow to use the conditional logic for this field. Is there something new we have to do to enable that?