We recently found out that one of our ducts was just petrified old tape, there had never been any metal ducting there at all. It wasn’t cheap to get fixed but it has made a noticeable difference in how long the AC is on and the temp in the house.
I have had good experience preventing this from happening by disabling Wake-On-LAN, or enabling deeper sleep modes that remove that capability, on my systems that don’t need it.
My suspicion is that many devices these days are pinging the LAN devices around them, for instance other Windows machines looking for printers and network shares, and this is waking devices that are in higher sleep states.
Why can it even register a temperature that high? You would think it would cut off somewhere around Death Valley in summer…