I have 6 Osram Lightify bulbs and I have them working great with ST. There is one minor annoyance and that is they glow when I turn them off using the ST as opposed to “flipping the switch”. When I shut off the light switch they shut off all the way, but when I use ST to turn them off, they still glow, very faint, but they still glow.
1 You should NEVER turn off smart bulbs with the switch unless it is to reset the bulbs because of a problem.
2 Since you have them on a switch, is it a mechanical dimmer or 3-way ? If so there is likely power bleed causing the lights to glow which is below the threshold for the radio to actually work.
Reviving this old conversation since a search did not turn up any others.
I have the same situation. With my Osram Lightify color temp adjustable can lights, and not my RGBW can lights, the lights emit a very dim glow when switched off via the hub, and not a physical switch. I have tried all of the different DHs without any success. I would like to use the color temp adjustable lights in my bedroom, but this causes me to think twice before doing so.
Mine does this as well. I think it’s because the LED lights draw so little power that there’s not enough resistance to complete shut them off. But that’s my guess.