Custom Plugin dev insert custom term

Hi,

I am building a plugin that requires me to register custom post types and terms.

The post type has been registered correctly with:

if (is_admin()) {
    require_once(plugin_dir_path(__FILE__) . 'classes/aggregator.php');

    add_action('init', array('Aggregator', 'init'));
    add_action('init', 'register_post_types');

}

function register_post_types()
{
    register_post_type('social_post',
        array(
            'labels' => array(
                'name' => __('Social Posts'),
                'singular_name' => __('Social Post')
            ),
            'public' => true,
            'menu_icon' => 'dashicons-admin-users',
            'taxonomies' => array('area'),
            'has_archive' => true,
            'rewrite' => array('slug' => 'social-posts'),
        )
    );
}

register_taxonomy(
    'social_agg',
    'social_post',
    array(
        'label' => __('Social Aggregator Type'),
        'public' => true,
        'rewrite' => false,
        'hierarchical' => false,
    )
);

register_taxonomy('platform', array('game', 'post'), array(
    'label' => __('Social Aggregator Type'),
    'public' => true,
    'rewrite' => false,
    'hierarchical' => false,
));

I also register the taxonomies in this block of code.

When inserting the new terms I use the following:

$types = ["Twitter", "Facebook", "YouTube"];

        foreach ($types as $type => $value) {
            wp_insert_term(
                $value, // the term
                'social_agg', // the taxonomy
                array(
                    'description' => '',
                    'slug' => strtolower($value),
                    'parent' => 0
                ));
        }

Which seems to insert them correctly but always adds in the same amount but with IDs in them for values I guess they are aliasing them?

Just wondering why they are doing this and if this is avoidable?

Looking back at the code is it because the taxonomies aren’t registered in a function on init like the post type?

Thanks,

Harry