Metabox Relationships Rank Math Conflict

I recently noticed that Rank Math's sitemap.xml is no longer working on my site. After doing some digging and disabling code in my theme I noticed that whenever I removed the Metabox Relationships declarations the sitemap started working again. An example of the code I am commenting out can be found below:

<?php

/**
 * MetaBox CPT Relationships Declarations
 *
 * @package Effiliate
 */

// Exit if accessed directly.
defined('ABSPATH') || exit;

add_action( 'mb_relationships_init', function() {
    MB_Relationships_API::register( [
        'id'   => 'operator_to_game',
        'from' => 'operator',
        'to'   => 'game',
    ] );

    MB_Relationships_API::register( [
        'id'   => 'operator_to_payment',
        'from' => 'operator',
        'to'   => 'payment',
    ] );

    MB_Relationships_API::register( [
        'id'   => 'operator_to_bonus',
        'from' => 'operator',
        'to'   => 'bonus',
    ] );

    MB_Relationships_API::register( [
        'id'   => 'operator_to_regulator',
        'from' => 'operator',
        'to'   => 'regulator',
    ] );
} );

I also have the mb-rankmath installed however it seems that this does not make any difference.