ZBDongle-P Coordinator refuses to pair new and existing devices

Configuration Zigbee
1

I have a ZBDongle-P running with HA for over a year and suddenly one device after another drops out of the network (“offline”) and i can’t get them back in. All pairings, even for new devices end up with the same error

[2025-06-04 15:00:11] Interview - node descriptor request failed for '0x0ceff6fffecdff59', attempt 1
[2025-06-04 15:01:01] Interview - failed for device '0x0ceff6fffecdff59' with error 'Error: Interview failed because can not get node descriptor'

Home Assistant => 2025.5.3
Zigbee2MQTT => 2.4.0
Am Raspi hängt mit einer USB-Verlängerung ein “Sonoff ZBDongle-P” an /dev/ttyUSB0
Coordinator-Typ => “ZStack3x0”
Coordinator-Version => 20240710 (CC1352P2_CC2652P_launchpad_coordinator_20240710.zip)
Frontend-Version => 0.9.13
Zigbee Herdsman Konverter Version => 23.53.0
Zigbee Herdsman Version => 4.1.0

What could have been wrong?

2

Did you try to restart Zigbee2mqtt?

3

Meanwhile i replaced the Dongle with a new one. I’m not sure what healed it in the end, could be that cleaning the NVRAM would have been enough, don’t know.