For years I have had my zigbee network functional with a ConBee2 zigbee coordinator in my home assistant box.

But this week, devices started to randomly drop off the zigbee network. I could re-pair them and get them in again. But yesterday, it suddenly dropped 24 devices… Sensors, buttons and lightbulbs seem to be the most common ones.

I’ve restarted the ZHA integration, restarted the docker container, even downgraded to 2026.8.3. Still the same.

I checked the Home-Assistant github repo issues and there are lots of issues regarding zigbee and dropped devices in the last 2-3 weeks.

Does anyone have any suggestions as to why this happened all of the sudden?

The zigbee network has been stable for years before this.

EDIT: At this time I have re-paired all the devices and will see if they start dropping off again.

  • StritOPEnglish
    1•1 day ago

    Thanks. All the plugs and bulbs are routers, so I have about 20 routers in the network, so that shouldn’t be an issue.

    • Stefano PrennaEnglish
      1•21 hours ago

      Indeed, and also, have you checked the CPU usage? Maybe it is heavily used? Otherwise, I have no other ideas at the moment

      • StritOPEnglish
        1•5 hours ago

        CPU usage on the server is about 5-10% (it does loads of other things too), so home assistant is not using much.