I've had a Lutron Maestro MS-OPS2 installed in a closet for 3 years and it has worked flawlessly. Recently it started turning on and staying on. To my knowledge, nothing has changed. I can manually turn the switch off but after about 30 seconds it turns back on again. I have experimented with the different modes in the switch's manual (vacancy mode vs. occupancy mode), different sensitivity settings, etc. and nothing changes. The switch acts like it sees something.
FWIW, the switch is driving an LED strip that draws about 20W.
My question is: how can I tell if the switch has simply gone bad or if something else in my house has changed? I've had no electrical work done recently and I know of no new devices on that circuit or even physically nearby.