revert to os 7.2. What makes you think 7.2 is insecure?
Just for the record: “restart” the host is “power cycle” the host.
I am still on 7.1 but when I updated from 2021.12.10 to 2022.2.3 I also lost ZHA - ha core restart did not help - it worked after epowercycling the host.
Maybe removing and re-inserting the zigbee usb key would also have done the trick.
Same has happened to mine.
Can upload logs if anyone is bored haha
Please try 2022.2.6 first, 2022.2.3 is outdated already
I think its something with the OS specifically. 7.3 & 7.4 are broken. I’ve had no issues with any core updates and just went to 2022.3.1, ZHA works fine.
What stick does everyone have? I have the HUSBZB-1 Zigbee / Z-Wave combo which I know is a little older. Maybe the OS changes removed something the USB stick needs?
I’m too scared to update the OS anymore though 
1 Like
I started to use HA in my NUC since 1 January and used always latest updates. I only used 3 or 4 zigbee devices with ZHA and a conbee II. And so far, I didn’t have issues.