I tried this myself yesterday 
- Tried pairing a Zigbee device with Homey
- Reboot Homey because it failed to pair the device (
) - Tried pairing the same Zigbee device again, which succeeded
- Reset Zigbee network, which caused the device to be marked with a red triangle
- Rebooted Homey
- Device was still there, marked with a red triangle. Started repair, which worked.
