Connection works fine, then it keeps going offline. Have installed 4 bulbs, and 3 do this. Not a Wi-Fi proximity issue, as 2 of the 3 that go offline are closer to the router than the one that stays connected. All Wi-Fi strengths are showing full 3 bars while connected. Have removed them and reinstalled…same result. Oddly, I immediately changed the hue to the warm end, and the bulb retains this setting even when disconnected.
After more fiddling, I discovered that once you connect/pair the bulb to your app, you must always use the app to control the light. I had thought I could turn the bulb on in the app, and still have the option to turn the light on/off with the switch. But if you turn off the light with the switch, it will soon go offline in the app. Lesson learned !