Z2M Network_down after updating to HA Core 2025.6

Configuration Zigbee
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Hi! Started having some issues in Zigbee2MQTT after updating Home Assistant Core to 2025.6. I believe I was in 2025.4 before.

It happens a couple times a day, like every 3 hours. I can access Z2M front-end and try to turn on and off devices by they won’t respond. After rebooting Z2M it will start working again immediately every time. I uploaded an image to show some of the errors I’m getting.

I’m not that used to checking logs, so if logs are needed for debugging, instructions on how to get logs are welcome.

My Setup Information

Zigbee2MQTT

  • Dongle: SONOFF_Zigbee_3.0_USB_Dongle_Plus_V2
  • Coordinator type: EmberZNet
  • Coordinator revision: 7.4.2 [GA] (I’ve had the same issue on 7.4.5)
data_path: /config/zigbee2mqtt
socat:
  enabled: false
  master: pty,raw,echo=0,link=/tmp/ttyZ2M,mode=777
  slave: tcp-listen:8485,keepalive,nodelay,reuseaddr,keepidle=1,keepintvl=1,keepcnt=5
  options: "-d -d"
  log: false
mqtt:
  server: mqtt://core-mosquitto:1883
  user: mqtt-user
  password: 
serial:
  port: >-
    /dev/serial/by-id/usb-ITEAD_SONOFF_Zigbee_3.0_USB_Dongle_Plus_V2_20240218171409-if00
  adapter: ember

HomeAssistant

  • Installation method: Home Assistant OS
  • Core: 2025.6.1
  • Supervisor: 2025.05.5
  • Operating System: 15.2
  • Frontend: 20250531.3
    Generic x86-64, Beelink T4 (64gb / 4gb RAM)

I run MQTT in Home Assistant.
I do not have ZHA installed.

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Well, I’m using ZHA and I noticed a similar issue. Hence I reverted to 2025.5.3 using my previous backup. I’m also working on a parallel test installation as I’ll move from HA core to Docker containers. And same issue here as well: ZHA network down with 2025.6.1 container while Z-Wave nw is OK

2 Likes
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Have you tried a USB extension cable? I’d test interference issues to start and ensure you are using a USB 2.0 port. Avoid USB 3.0 for dongles.

A good ZigBee resource

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Thank you for your suggestions!
I am using a USB extension cable and keep the Dongle away from the mini PC.
Reading the Beelink T4 manual, it says my mini PC only has USB 3.0 ports.

Thank you for the resource, I’ll study it and see if there is anything I could improve that might solve my problem.

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Thanks, will try this as well; now my Z-Wave dongle is on USB2.0 (and it works in the new HA version), while ZigBee (and the external NVMe device) are on the two RB 3.0 ports.
Will try this and let you know, thank you! Franco

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Using ZHA and similar issue. Cannot update beyond 2025.4.4

Symptoms:

  1. Update to 2025.5 or 2025.6 goes fine
  2. Everything works for about an hour
  3. Zigbee goes down (probably some other systems too, e.g. Logs in web UI don’t work either)

The only way to revive the system is to rollback to 2025.4

OS Version: Home Assistant OS 15.1

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Hello, I’ve solved this although I still do not have a solid answer for the root cause of this issue.
I noticed that starting from a fresh conteinerized installation of 2015.6.3 ZHA was back up and running. It was not after a traditional HA upgrade tested a couple of weeks ago while moving my HA core installation from 2025.5.3 to 2026.6.1. Hence I suspected the issue was in 2025.6.1 and not in 2025.6.3.
BTW, before doing this I moved USB connections but this was not the problem.
I did the upgrade for 2025.5.3 to 2026.6.3 and … ZHA broken again, and to me this was a nonsense. Before quitting and restart from the backup I did the following:

  • remove the /srv/homeassistant directory and recreate a new one (same permissions …)
  • sudo su -s /bin/bash homeassistant
  • cd /srv/homeassistant
  • python3 -m venv .
  • source bin/activate
  • python3 -m pip install wheel
  • pip3 install homeassistant
  • exit

This fixed the issue, and imho this alternative procedure downloads some updated package which fixes the issue.
I’ve tried this twice and it worked, anyway I’ll keep my original 2025.5.3 backups for a while before confirming this version … :slight_smile:
Hope this helps and best regards,
Franco

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This is a Z2M thread, not for ZHA related issues.

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