I have only Lightify (OSRAM, tunable white and color) lights and outlets - about 25.
A few weeks ago, one of the A19 (color) stopped being controllable via voice / Google Home OR Hubitat. It was about a year old. Had to take it out. 3 other Lightify color lights are working just fine.
Then, a tunable white light in the hall stopped responding - it was maybe a week old. The other lights in the hall (same age) are working fine. Then a light in the bedroom stopped responding. It's a couple years old. All of these lights had been added to the Google Home Integration App, and to Google Home, and had been working with Google Home the whole time. Now, they appear in Hubitat, but not in the Google Home Integration App and won't stay added to it.
At this rate, it may take a year, but eventually none of my lights will work. I even broke down and replaced one of them with a new bulb, but Hubitat recognizes it... and it won't add to the Google Home Integration app.
I know the official story from Hubitat is that if the bulb won't add to the Google Home Integration App, then it isn't compatible with Google Home. But these bulbs all were added to the Integration App and worked with Google Home previously, so that clearly isn't the case here. (Plus, if these bulbs suddenly aren't compatible, say, due to a change on the Google Home end, none of my other bulbs would be compatible anymore, either.)
So, the ONLY way to control these bulbs, once this happens, is to physically turn them off, physically turn them on again, and only THEN I can control them through the Hubitat app. Re-pairing makes no difference. Re-naming makes no difference. And there is NO way to get them back in the Google Home App in Hubitat.
Hubitat's reply is "We'll look into it. Don't call us, we'll call you. But we have a great user community." So... Does anybody know a fix?