I used Nest thermostats in the past two years to preheat and then shut down heating during peak periods, which is rewarded by my electricity provider through credits (I live in a country north of the US). I control Nest devices through a Home Assistant domotic integration. Nothing fancy, a "off mode" command is issued before the peak period, and the thermostat is turned on after the peak period. All was working fine except this winter, I noticed a very weird behavior: the off command is issued and apparently received by Nest (the iOS Nest app (or the web app) is reporting my thermostats in off mode) but the physical device does not report the same and continues to heat! Is this a bug introduced with new firmware? An API change? Very confusing!
