Hiddens apps appearing in the sidebar

Hi,

I've noticed that some of our utility apps are appearing in the sidebar despite the last parameter of the register_app() method being true. These apps are locked down from being accessed with redirects but this is a little problematic when clients can see them in the menu.

Here is the admin.php of our monitoring app which appears in the sidebar as Heartbeat:

<?php

if($CurrentUser->logged_in() && $CurrentUser->roleMasterAdmin()) {
    $this->register_app('root_heartbeat', 'Heartbeat', 1, 'Site status monitor', '1.0.1', true);
    $this->require_version('root_heartbeat', 2);

    $this->add_setting('root_heartbeat_uid', 'Site UID', 'text', '', false, 'The UID is used to identify the report author and is used along with the signature to verify authenticity.');
    $this->add_setting('root_heartbeat_signature', 'Site Key', 'text', '', false, 'The signature key is created using the master server and verifies reports are authentic.');
    $this->add_setting('root_heartbeat_master_server', 'Master server', 'text', '', false, 'The master server host to send report data.');

    include(__DIR__ . '/vendor/autoload.php');
}

Is there something I have missed?