Hi! I have had the 3rd Gen. Hue system since Dec. 2016 with no problems. I recently moved, and had to but another light. This one light, and only this light, will not turn off when controlled via a third-party. This includes Alexa and HomeKit. The reason I love these lights is their HomeKit support. I do not like the Hue App. So, randomly the light will not turn off unless controlled with the Hue App. The only way to TEMPORARALY fix this is to use the Hue App to turn it off and on once, or unscrewing it also works for me. Flipping the switch DOES NOT FIX IT. This really is a problem for me. I have also made sure I am on the latest Software. I have this issue with HomeKit in iOS 10 and 11 (yes that’s the beta). Thanks in advance!!