Hierarchical post? Do nothing

I am using the redirection_monitor_types filter to add
more post types the Redirection URL monitor should watch.

However, there is one line in code that prevents this for a particular CPT:

// Hierarchical post? Do nothing
$type = get_post_type( $post->ID );
if ( is_post_type_hierarchical( $post->post_type ) && $type !== ‘page’ ) {
return false;
}

So hierarchical custom post types (not pages) are always ignored.
Why? I really want this enabled for my hierarchical custom post type.
How can I get around this restriction? There seems to be no option, hook or filter.

Thanks and
with best regards