rp4wp-wp-job-manager-force-normal-template.php

function rp4wp_wp_job_manager_use_normal_template( $located, $template_name, $args, $template_path, $default_path ) {

	if ( 'related-post-default.php' === $template_name && 'job_listing' === $args['related_post']->post_type ) {
		$manager_template = new RP4WP_Manager_Template();

		$located = $manager_template->locate_template( 'related-post-default.php', $template_path, $default_path );
	}

	return $located;
}

add_filter( 'rp4wp_get_template', 'rp4wp_wp_job_manager_use_normal_template', 20, 5 );