Do motion-sensing light switches go bad?
Leviton R22-PR150-1LW Infrared Motion Sensing Occupancy Switch
Recently, it's started self-triggering when the lights go off. There's an LED to show when it triggers, and the LED registers motion as expected, but also when the lights go out, the LED blinks and slowly fades over 1-2 seconds. Right as it's fading out, the lights turn back on. I've set the timer interval as low as possible, and the lights will now turn on and off every 30 seconds or so for hours.
I've power-cycled it at the breaker, without result. I haven't changed any of the controlled bulbs nor installed any IR emitters pointing at the sensor. There isn't even any furniture in the entryway or anything that could be reflecting the beam or something (I'm grasping at straws here...). Really nothing I can think of has changed that would cause this behavior.
Considering it's $13, I should get a new one. But, it bothers me that a device like this would fail after a couple of years. I would expect it either not to work out of the box, or effectively last forever. Has anyone else seen these fail, or am I overlooking a miniature, IR-focusing spy cam on the opposite wall?