Can no longer add Nanoleaf Essentials bulbs to HA (HomeKit version)

Hi, I have about 50 Nanoleaf Essential bulbs—the older, HomeKit version.

I previously had them added to HA, and they worked flawlessly.

I’ve moved house, and tried to re-add them to a fresh install of HA. No matter what I do, they don’t add to HA anymore.

I know the steps: Reset the bulbs, add to Apple Home, remove from Apple Home, and then they show up in HA for pairing.

My problem is that when I try to pair them in HA, I get an error message that the bulbs have already been paired with another device.

I’ve reset HA, my iPhone (which I use to set everything up), and I’m not sure what more I can do. They turn up in HA just fine when removed from Apple Home. It’s just the pairing in HA that doesn’t work.

Does anyone else have this problem?