We've had this switch installed for about 8 months. Over a week ago we noticed that it's on when we're not going through the room (mud room off the garage). I have seen the light turn off. But then it was back on again without anyone going through the room. I've tried going through the setup and changing the timeout, but no behavior change. We have a second one about 20 feet away which is still working correctly. I did notice earlier today that the lens was flashing every few seconds, but it's not currently doing that.