Alljoyn Brightness property not working on LIFX White 800

the Windows App called Alljoyn Explorer can see the light and the LampState OnOff property works, but the Brightness property always sets brightness to zero no matter what value I give it. Even when I set the LampState Brightness property value to 1 the readonly Brightness_Lumens property then reports 5662 (which is way above the maximum value of 890 that I was expecting). If I then run your LIFX app and connect to the bulb, the light turns back on and shows the right brightness. Is this a bug in your Alljoyn implementation ?