I've had this rule running for years (copied from ST days) Around the end of July the last step of the rule (fan & sound machine) started triggering on its own, and always at the same time (9:50pm)
I was too busy to look into it for a while, then last week I finally noticed the Rule Machine app was 'Legacy' and there was a new Rule Machine build. So i recreated this rule in the new app, and let it run for a few days. Same results: 9:50 fan & sound turned on. So I stopped the rule (as shown) and still the sound & fan are turning on.
Two things: Turn on Action logging in the rule, and keep a Logs tab open around 9:50. Look at the In Use By section at the bottom of the device page for one of the devices turning on unexpectedly, and see what apps are in use. One of those apps is the likely culprit.
I thought about this after the post, I should have posted the IN USE BY before.
Everything is manual controls except the Off @ 715am and On with the rule.
I also just realized the Motion sensor that is supposed to trigger all of these events has been unresponsive for about 5 weeks also, so this rule is triggering while stopped & without the trigger event entirely.
Aparently the 915 time was 7-31 - 8-6. Now its 10:15
You haven't really shown any evidence that a rule is doing this. That's your supposition, but where's the beef? If your theory is that a non-existent rule is doing something to this device, I think you need some proof.
Alexa has a "feature" that will learn an action, then repeat it, as it assumes you want to do this thing every day at that time. Not sure is Google has that same "feature".
YES That is it!!
No idea how / why google got those switches on a bedtime routine, or how its triggering a bedtime routine without me saying 'goodnight' as the routine page says.. but whatever that fixes my mystery