如何使用paho.mqtt.golang库订阅多个MQTT主题？

Subscribe()

p1/test

A simplified version of my program:

func main(){
    var opts = MQTT.NewClientOptions()
    opts.AddBroker(address)
    opts.SetClientID("go-controller")

    opts.SetDefaultPublishHandler(func(client MQTT.Client, msg MQTT.Message) {
        log.Printf("topic: %s
", msg.Topic())
    })

    client = MQTT.NewClient(opts)
    if token := client.Connect(); token.Wait() && token.Error() != nil {
        log.Panicln(token.Error())
    }

    client.Subscribe("P1/#", 0, logHandler)
    client.Subscribe("P1/controller/registration", 0, registrationHandler)
}

var logHandler MQTT.MessageHandler = func(client MQTT.Client, msg MQTT.Message) {
    ...
    log.Printf("Topic %s logged...
", msg.Topic())
}

var registrationHandler MQTT.MessageHandler = func(client MQTT.Client, msg MQTT.Message) {
    ...
    log.Printf("Topic %s registered...
", message.Value)
}

EDIT #1

I found out that the oder of subscribing to topics matters. When I swap both subscription calls the correct handlers get called.