After a successful setup (with successful hot and cold tests), and firmware update to 1.1.1, the device screen was frozen with ‘Wyze’, despite any manual manipulation of the wheel, removing and re-inserting the thermostat, toggling circuit breaker, etc. Attempted to delete device and re-install, but this time was not even able to locate the thermostat during the pairing step!
Finally fixed by a hard manual reset of the device (hold down the knob till you get the reset screen). Re-installed device, and now it works! Hope this helps others!