B4R Question MQTT LastWill

[Blueforcer]

I recognize a wierd bahavior with MQTT in B4R.
I set up and connect to my Mosquito Broker via:

Private Sub ConnectToNetwork
    Wifi.Disconnect
    Log("Trying to connect")
    If Wifi.Connect2("Kindergarten", "XXXX") Then
        Log("Connected successfully to: ", "Kindergarten")
        Log("Local IP: ", Wifi.LocalIp)
        mqtt.Initialize2(mqttSocket.Stream,"placeholder", "1883", UUID, "mqtt_MessageArrived", "mqtt_Disconnected") 'ignore
        mo.Initialize("user", "password") 'ignore
        mo.SetLastWill(statusTopic, "offline", 1, True)
        If mqtt.Connect2(mo) Then
            Log("MQTT connected")
            mqtt.Subscribe(commandTopic,1)
            mqtt.Publish2(statusTopic,"online".GetBytes,True)
        End If
    End If
End Sub

If the ESP boot it sends "Offline" AND "Online" to the "statusTopic".
After the a disconnect of the ESP no LastWill will be sent.
It seems that the LastWill command does exactly the same as publish.
Where is my Problem?
In B4J the LastWill works as expected.

My B4J Server Application listen to every topic (#).
Im also using the latest B4R with rMQTT 1.30

 

[Erel]

If the ESP boot it sends "Offline" AND "Online" to the "statusTopic".

When the program starts to run it actually starts twice. As a test add Delay(5000) at the beginning of the program and see whether you still see this behavior.