Zigbee down and full recovery needed, again and again

Hi! I have an older white ball Homey Pro (2019 ver., I think). I’m getting a bit tired of zigbee network shutting down completely about once a month. When it happens, I can’t add new zigbee devices as Homey will give the error “Zigbee could not be started” when trying to add the device. Restarting in recovery mode and doing the “full software download” gets it back every time, but for how long? That’s always the exciting question with my Homey.

I’ve seen multiple posts about zigbee network going down and people doing recovery restarts. So I’m wondering if anyone have had similar issues reoccurrence of this, and have gotten somewhere with it?

More about my network:

  • This is a small house and I would assume it would be uncomplicated in terms of signals reaching around. But I’m very curious if this is a signal and routing issue, or a hardware issue with the Homey?

  • I have multiple wall powered “router devices” close to the homey and around the house, such as lights and smart plugs etc. I have about 25 zigbee devices in total. Some times I inspect the Zigbee mesh network in Developer tools, and a couple of times I’ve had problems with some of the devices in the meshing routes show an “?”, and I then get trouble reaching wireless devices on that route whenever it happens. But the zigbee network doesn’t completly shut down because of that.

  • I find it funny though that Homey usually choose what intuitively sounds like the worst mesh routes to me. For example using an outdoor smart plug in my garage as the first routing device, then an outdoor smart plug all the way on the other side of the house as the next one, before ending up at a wireless device 2 meters away from the Homey.

  • My zigbee is running at zigbee channel 11. I have a wast Philips Hue network which runs at channel 16 and have been super stable for 4 years. I’ve locked my wifi router to 2.4 GHz channel 13 (as far away as I get from zigbee channel 11).

  • Now I’ve just bought an Aeotech Zigbee extender and hope it will help a bit if I’m placing it centrally in my house.

This is normal behaviour for zigbee/z-wave mesh networks. I see similar behaviour with zigbee2mqtt f.i.