Cowsr4eating described my problem as well.
Yesterday I disabled 1 of my 4 thermostats
(Omnistat2 - Zigbee) and when I reinitialized it, all 4 displayed Celsius along with 2 temperature sensors
. I then disabled the Plugin (v126.96.36.199) and it duplicated the 4 devices (in Celsius) when initialized. During the day 2 changed over the Fahrenheit and the other 2 changed back over night.
Also, even leaving the device names unchanged, they don't display in MYHS app.
The "Root Device" and all the individual components are listed with the "HAI" graphic instead of a reading.