Weird bug?

[it-can]

I was busy with syncing carts with logged in users just like the demo code... I noticed something something weird.

https://github.com/cartalyst/demo-cart/blob/6.x/app/Listeners/UserEventListener.php#L60

this code works

public function subscribe(Dispatcher $dispatcher): void
    {
        $dispatcher->listen('Illuminate\Auth\Events\Login', __CLASS__ . '@onUserAuthenticated');
    }

The cart is synced and the items in the database is also synced... But when I use a closure, this doesnt seem to work anymore...

public function subscribe(Dispatcher $dispatcher): void
    {
        $dispatcher->listen('Illuminate\Auth\Events\Login', function ($event) {
            $this->onUserAuthenticated();
        });
    }

Any idea why this is not working?