Device.subscribe missing

Troubleshooting
1

Hello, I’m using device.subscribe with SparkJS after fetching my cores using spark.getAttributesForAll().

One of my cores (the only one currently connected) does not have the subscribe function. The other two has it:

for (var i=0; i<devices.length; i++){
    var d = devices[i];
    console.log(d.name + " " + d.subscribe);
}

Outputs:

Astro Core function (eventName, callback) {
  return this._spark.getEventStream(eventName, this.id, callback);
}
Snickarboa undefined
Testcore function (eventName, callback) {
  return this._spark.getEventStream(eventName, this.id, callback);
}

Why does the connected core “Snickarboa” not have the subscribe function?

Cheers