Nanoleaf bulbs (pre-matter but thread) disappearing after restart

Hi,

I have a very strange issue with some of my nanoleaf essential bulbs. They are pre-matter devices but with thread support. So I have openthread border router with slzb radio and this setup is working perfectly with four other Nanoleaf essential bulbs.

However, two of these bulbs behave like this

  • I can add them to HA using the BT proxy, then I provision them thread credentials and they are working fine
  • UNTIL I restart Home Assistant. After restart HA the devices disappears, so I have to add them again…

Anyone with similar experience? Is there any solution to solve this?

It is even more interesting, after I add again the device, the old one become visible but status unknown…

My other bulbs stay stable after reboot…