hezqeel
January 1, 2026, 4:43am
5
I have the same issue, all Zigbee devices are offline!!!
This is not the first time it happened with me, see the post I just posted it 3 days ago and got no technical explanation or even how to resolve and avoid this issue.
I have 1st Hub as primary and 2nd Hub as secondary in a hub group for my house, all of a sudden without no charges at all in the internet connection, modem or even the power lost all 180 ZigBee devices while both hubs are connected to the internet and accessible remotely. I checked the Zigbee radio for both hubs in my.smartthings.com and found both hub zigbee radio functionality are false and Zigbee channel changed by itself to 0.
This issue happened before 2 times and case number for the second time is 1493365.
I tried the whole day to set the Zigbee channel to 15, 20 or any channel but unfortunately it says “Error changing Zigbee channel to “15”. 500 Failed to set zigbee network channel: Zigbee Subsystem Unavailable Error”.
I restarted both hubs, shutting down both hubs for half an ho…