Comments aren't triggering the webhook events

[rafistrauss]

I have my server listening to webhook events like so:

$client = new Client();
$client->authenticate(Credentials::TrelloAPIKey, Credentials::TrelloAPIToken, Client::AUTH_URL_CLIENT_ID);

$service = new Service($client);

// Other event listeners here
$service->addListener(Events::CARD_COMMENT, function (CardCommentEvent $event) {
//    do something here
});
$service->handleWebhook();

However, when I comment on a card, nothing happens. Other triggers, like creating a card or changing a card's list, work perfectly.