I have had great succuss with INNR bulbs until now. I think it might be a bug in the software since all others are working fine.
I bought a few spares when I replaced all my old incandescent bulbs. One the INNR bulbs died a few years later. I attemted to replace it with one of the spares. Device discovery/pairing finds it, but never completely initializes it. It just goes back to the "start pairing" screen. This happened on all (4) spares.
I have attempted to pair the bulbs to both of my hubs (model 5 and 7). I factory reset the bulb each time. Same issue. I have a strong Zigbee network with at least one repeater in each room. I also tried it in a lamp less than 10 feet from my hub. Same result.
OK, well its not a C8 exclusive issue then, not that it helps with the actual problem however...
If someone cares to loan me one of these that doesn't finish initialization I can have a look.
The unit I have has the same firmware version, and joins, so it would be helpful to test with a known issue device.