Bad Aeon Gen 5 Sensor? (solved)

So one of my Aeon Labs Gen 5 sensors got stuck on active motion and was not reporting anything else. I powered cycled the device and that did nothing. I excluded/included the device, it paired ok, but is no longer reporting the motion. Did the motion sensor just died on me?

and the problem was?

Update: resetting the sensor (pressing and holding for 20 seconds) solved the problem. All sensors are reporting again!