RPi5: Zigbee2MQTT (Ember / Sonoff Zigbee 3.0 USB Dongle Plus V2) fails after update to HAOS 17.2, works again on 17.1

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Describe the issue you are experiencing

Title:
RPi5: Zigbee2MQTT (Ember / Sonoff Zigbee 3.0 USB Dongle Plus V2) fails after update to HAOS 17.2, works again on 17.1

Description:
After updating Home Assistant OS from 17.1 to 17.2 on a Raspberry Pi 5, Zigbee2MQTT no longer starts.

The Zigbee adapter is a Sonoff Zigbee 3.0 USB Dongle Plus V2.
Zigbee2MQTT detects the adapter and opens the serial port, but fails during Ember/EZSP startup with HOST_FATAL_ERROR.

Downgrading back to HAOS 17.1 restores normal operation immediately.

Important detail:
My working configuration on HAOS 17.1 uses:
/dev/ttyUSB0

I also tested switching to:
/dev/serial/by-id/usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_6859efe4e7c2ef11908eedb08048b910-if00-port0

That did not fix the issue.
The /dev/serial/by-id path does not work for me on this setup, including HAOS 17.1.
So the working configuration is /dev/ttyUSB0 on 17.1, and that same setup fails after updating to 17.2.

Hardware:

• Raspberry Pi 5
• Sonoff Zigbee 3.0 USB Dongle Plus V2

HAOS versions:

• Working: 17.1
• Broken: 17.2

Working Zigbee2MQTT config on HAOS 17.1:
serial:
port: /dev/ttyUSB0
adapter: ember

Tested but not working for me:
serial:
port: /dev/serial/by-id/usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_6859efe4e7c2ef11908eedb08048b910-if00-port0
adapter: ember

Relevant log on HAOS 17.2:
[2026-04-20 21:32:20] info: z2m: Starting Zigbee2MQTT version 2.9.2
[2026-04-20 21:32:20] info: zh:adapter:discovery: Matched adapter ... => ember: 4
[2026-04-20 21:32:21] info: zh:ember:uart:ash: Serial port opened
[2026-04-20 21:32:21] info: zh:ember:uart:ash: ======== ASH starting ========
[2026-04-20 21:32:26] info: zh:ember:uart:ash: ======== ASH Adapter reset ========
...
[2026-04-20 21:32:46] error: z2m: Error: Failed to start EZSP layer with status=HOST_FATAL_ERROR.

Additional notes:

• The issue appeared immediately after upgrading from HAOS 17.1 to 17.2.
• Rolling back to 17.1 restores functionality with /dev/ttyUSB0.
• This is on Raspberry Pi 5.

What operating system image do you use?

rpi5-64 (Raspberry Pi 5 64-bit OS)

What version of Home Assistant Operating System is installed?

6.12.47-haos-raspi

Did the problem occur after upgrading the Operating System?

Yes

Hardware details

Sonoff Zigbee 3.0 USB Dongle Plus V2

Steps to reproduce the issue

Just Upgraded to 17.2, Zigbee2MQTT wouldn't start up anymore.

Anything in the Supervisor logs that might be useful for us?

nothing relevant

Anything in the Host logs that might be useful for us?

nothing relevant

System information

System Information

version	core-2026.4.3
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
container_arch	aarch64
user	root
virtualenv	false
python_version	3.14.2
os_name	Linux
os_version	6.12.47-haos-raspi
arch	aarch64
timezone	Europe/Berlin
config_dir	/config

Home Assistant Community Store

GitHub API	ok
GitHub Content	ok
GitHub Web	ok
HACS Data	ok
GitHub API Calls Remaining	4996
Installed Version	2.0.5
Stage	running
Available Repositories	2941
Downloaded Repositories	63

Home Assistant Cloud

logged_in	[redacted]
subscription_expiration	[redacted]
relayer_connected	[redacted]
relayer_region	[redacted]
remote_enabled	[redacted]
remote_connected	[redacted]
alexa_enabled	[redacted]
google_enabled	[redacted]
cloud_ice_servers_enabled	[redacted]
remote_server	[redacted]
certificate_status	[redacted]
instance_id	[redacted]
can_reach_cert_server	[redacted]
can_reach_cloud_auth	[redacted]
can_reach_cloud	[redacted]

Home Assistant Supervisor

host_os	Home Assistant OS 17.1
update_channel	stable
supervisor_version	supervisor-2026.04.0
agent_version	1.8.1
docker_version	29.1.3
disk_total	234.0 GB
disk_used	136.6 GB
nameservers	[redacted]
healthy	true
supported	true
host_connectivity	true
supervisor_connectivity	true
ntp_synchronized	true
virtualization
board	rpi5-64
supervisor_api	ok
version_api	ok
installed_addons	File editor (6.0.0), Advanced SSH & Web Terminal (23.0.7), Node-RED (21.0.7), Samba share (12.6.1), Matter Server (8.4.0), Mosquitto broker (7.0.1), Zigbee2MQTT (2.9.2-1), Studio Code Server (6.0.1), InfluxDB (5.0.2), Grafana (12.1.0), SMA Energy Meter (1.0.2), Govee to MQTT Bridge (2026.03.25-ab9deb66), Whisper (3.1.0), Piper (2.2.2), OpenThread Border Router (2.16.7)

Dashboards

dashboards	9
resources	42
views	84
mode	storage

Network Configuration

adapters	[redacted]
ipv4_addresses	[redacted]
ipv6_addresses	[redacted]
announce_addresses	[redacted]

Recorder

oldest_recorder_run	23. März 2026 um 11:47
current_recorder_run	20. April 2026 um 21:46
estimated_db_size	3320.46 MiB
database_engine	sqlite
database_version	3.49.2

Additional information

No response