Controller in subdirectory

My folder structure is 
/App/Controllers/Api
I have a file named Internal.php with a class name Internal that extends Controller the class has only one public method named bounce
I expected to be able to access the method at '/api/internal/bounce' but I get a 404 instead at that url.

If I move my controller to the /App/Controllers directory I am able to access the method at '/internal/bounce'

Can someone help point me in the correct direction?

Here is my routes file if it helps

PHP Code:

<?php
namespace Config;

// Create a new instance of our RouteCollection class.
$routes = Services::routes();

// Load the system's routing file first, so that the app and ENVIRONMENT
// can override as needed.
if (file_exists(SYSTEMPATH . 'Config/Routes.php')) {
    require SYSTEMPATH . 'Config/Routes.php';
}

/**
 * --------------------------------------------------------------------
 * Router Setup
 * --------------------------------------------------------------------
 */
$routes->setDefaultNamespace('App\Controllers');
$routes->setDefaultController('Site');
$routes->setDefaultMethod('index');
$routes->setTranslateURIDashes(false);
$routes->set404Override('App\Controllers\Site::show_404');
$routes->setAutoRoute(true);

/*
 * --------------------------------------------------------------------
 * Route Definitions
 * --------------------------------------------------------------------
 */

// We get a performance increase by specifying the default
// route since we don't have to scan directories.
$routes->get('/', 'Site::index');
$routes->get('/privacy-policy', 'Site::privacy_policy');
$routes->get('/terms-of-use', 'Site::terms_of_use');
$routes->get('/homes-we-have-bought', 'Site::homes_we_have_bought');
$routes->get('/faqs', 'Site::faq');
$routes->get('/why-us', 'Site::why_us');
$routes->post('/thank-you', 'Site::thank_you');
$routes->get('/careers', 'Site::careers');
$routes->get('(?i)(\w+[-?\w+?]+)-([a-z][a-z])-cash-home-buyers', 'Site::city/$1/$2/1');
$routes->get('(?i)(\w[-\w+]+)-([a-z]+)-cash-home-buyers', 'Site::city/$1/$2/3');
$routes->get('sell-my-house-fast-(?i)(\w+[-?\w+?]+)-([a-z][a-z])', 'Site::city/$1/$2/2');
$routes->get('/sitemap.xml', 'Site::sitemap/xml');
$routes->get('/sitemap', 'Site::sitemap/html');

/* Redirects for old site */

$routes->addRedirect('/fortworth-cash-home-buyers', '/fort-worth-tx-cash-home-buyers');
$routes->addRedirect('/corpus-christi-cash-home-buyers', '/corpus-christi-tx-cash-home-buyers');
$routes->addRedirect('/midland-odessa-cash-home-buyers', '/midland-odessa-tx-cash-home-buyers');
$routes->addRedirect('/get-cash-offer', '/');
$routes->addRedirect('/we-buy-houses-for-cash-in-abilene-texas', '/abilene-tx-cash-home-buyers');
$routes->addRedirect('/san-antonio-cash-home-buyers', '/san-antonio-tx-cash-home-buyers');

/*
 * --------------------------------------------------------------------
 * Additional Routing
 * --------------------------------------------------------------------
 *
 * There will often be times that you need additional routing and you
 * need it to be able to override any defaults in this file. Environment
 * based routes is one such time. require() additional route files here
 * to make that happen.
 *
 * You will have access to the $routes object within that file without
 * needing to reload it.
 */
if (file_exists(APPPATH . 'Config/' . ENVIRONMENT . '/Routes.php')) {
    require APPPATH . 'Config/' . ENVIRONMENT . '/Routes.php';
}