I am using KS2000M which is smart switch with motion sensor for my garage light. It works well for about 2 weeks only. It won't turn off after that. I have tested a few months to figure out. Here is my test result but I still have no idea root and cause. Once I cannot turn off 1. Turn off the circuit breaker 2. Take off LED bulbs from socket 3. Just leave it for a few days 4. Reinstall LED bulbs then the switch works like charm for about 2 weeks then won't turn off again. I cannot turn off either manually but can hear click sound from switch when press the button.  As it works for 2 weeks I do not think wiring issue. But please educate me if it could be still an issue for this. I updated the latest firmware. What is the root and cause you think?