Turn off the f@&"×# auto update!
You’ll be notified when there’s an update available, for you to decide what to do.
Here you can view the fw changelog:
https://homey.app/en-us/wiki/homey-pro-2016-2019-changelog/
Zigbee fix:
First replace the power unit with a decent one (samsung, apple), replace the USB cable as well.
Then, start Homey in recovery mode and perform the so called “full software download”
The full software download just re-installs the firmware from scratch, untouching your work.
As always, do keep a recent backup in place just in case.
If it doesn’t fix Zigbee, Athom can flash the Zigbee chip remotely. Call support for that: homey.app/support