I had someone reach out to me with a problem where their HestiaPi was rebooting every time the heat turned on. This occurred right after they re-flashed their SD card, which they did because their thermostat started boot looping.
In the end it turned out to be a faulty SD card. The user bought a new SD card, flashed it with the v1.4-dev image and it’s working fine now. They then tried flashing that same image to the old card, using the same software (the disks program) to do so and it still had the resetting problem when the heat kicked on.
I wanted to mention this here so it’s documented, because I certainly didn’t think a faulty SD card would cause the behavior they described! I’m still perplexed just thinking about this, but in the end, we don’t necessarily have to understand why something is broken in order to know how to fix it. I plan on updating the troubleshooting section of the owner’s manual to document this problem and solution there as well.