waitForAuth does not wait

I'm trying to auth a user and then subscribe a channel using {waitForAuth: true}. Here is the client code:

var socket = socketCluster.create(options);
  socket.emit('auth', 'test');
  var channel = socket.subscribe('my-channel', {waitForAuth: true});
  channel.watch((e) => {
    console.log(JSON.stringify(e));
  })

And the server code is as described in https://socketcluster.io/#!/docs/authentication

The problem is that the MIDDLEWARE_PUBLISH_IN always runs before auth because of the db code and the user fails to subscribe; authToken is always null.

It works when I change to

socket.emit('auth', 'test', function (err) {
  if (!err) {
    var channel = socket.subscribe('my-channel');
    channel.watch((e) => {
      console.log(JSON.stringify(e));
    });
  }
});

which is quite spaghetti.
So the problem is that waitForAuth is not actually waiting anything. What am I doing wrong?

Start by tracing the client-side waitForAuth subscription path and the authentication flow described in the linked authentication documentation. Check the ordering between socket.emit('auth'), MIDDLEWARE_PUBLISH_IN, and subscription handling, especially when authToken is still null. Done means {waitForAuth: true} reliably delays subscription authorization until authentication completes.