Glad I'm not alone, lol. Google seems determined to either show me some search results or bring up a YouTube video for even the simplest commands. Been driving us nuts for a couple of weeks now.
Amazon Alexa is also behaving weirdly when the make it better with the AI. Trying too hard to anticipate me and doing things it THINKS I want. I have got to figure out if there is a setting for a blonde Alexa (joke, no offence meant for any of the very smart blondes I know).
I am so glad I don't use Amazon or Google integrations. I only use the Amazon Echo devices to play music and do TTS.
For Alexa, there are some advantages. Best is the voice assistant capability. Really is convenient - but keep it simple to start out (i.e., create activities in Hubitat and link into Amazon). It is (was?) also helpful in some Matter device initial installs. Also is good for the occasional must-have non-Hubitat smart device.
For the last 3-4 months, Alexa has been listening closely to our conversations and -without our using the prompt- "Here's music yada yada yada."
Some would pay a premium for such feature, or blog about it if released, so consider yourself privileged to have such feature available to your family 
Previously Alexa always seemed to be the "dumbest" of the various assistants, at least to me - But she did simple smart home commands reasonably well - That all said, Alexa+ is a game changer, IMHO, in that they seemingly (and amazingly) didn't break much backwards compatibility in SmartHome links (or skills), and yet she is now better than Google in terms of answering general questions, handling conversations, versus just stateless commands, scheduling future smart home commands, and even handling multiple commands strung together.
My only complaint is that 3rd party hardware (aka Sonos) that was running Alexa, doesn't seem like it will ever be upgraded to Alexa+. It took 10 years, during which very little improved, but the Amazon AI adds to Alexa+ have raised the bar for voice assistants to SmartHomes (and Matter is SLOWLY helping as well)
That said, I do feel mildly guilty for use KwH(s) of power, and hundreds of gallons of cooling water, just to run a "good night" routine.
You may want to consider changing your wake-word. Not sure what form of Alexa device (Show, echo, 3rd party?), but something is triggering Alexa to respond..
It just doesn't randomly start playing music. I believe, by default, there are logs on the Alexa website, where you can get timestamped lists of what commands it heard, and it's response - They may be worth investigation to track down the trigger source.
We were given an Alexa as a gift a dozen years ago. The last thing it did before we erased, unplugged, and re-gifted it was to start talking and playing music in a completely silent room, where SWMBO and I were both reading (actual paper) books.
This topic is the exact reason I have so fervently embraced Hubitat. There is no automation in our very automated home which goes outside these walls, and Bog willing, it'll stay that way.
I support and endorse local control and privacy as much as any person - But SOMETHING had to trigger it - there are multiple reasons it can fire, beyond the wake word - See: 9 Reasons Your Alexa Randomly Beeps and How to Fix It
But it's not streaming everything to the AWS cloud always - it needs some trigger - Obviously not a wake word in your silent room. - it's sort of a moot point, given it's gone, but I would definitely be checking the Alexa history logs to undertand the root cause.
For me, the positive of voice commands (Grocery lists, timers, and smart home scene triggers), outweighs the security concerns given what other data that Amazon (purchases and video selections) and Google (Mail & Schedules) already have on me. - It's hard to live in a totally private world, without leaving digital footprints all over the internet.
That all said - I'm not on ANY social media, and don't login to google when on Youtube, and frequently change my AdID on both our IOS and Android phones - But, IMHO, any smartphone usage is a much larger privacy giveaway versus a smart assistant.
I would expect others to have differing views on this.
There was no wake word involved.
As noted in previous post - there has to be SOME trigger... - There are other possibilities outside of the wake word (Hunches are just a terrible idea, and I'm not a fan of Amazon Sidewalk either). But the truth is in the history logs...
As if there were not enough issues, now we have Matter to add to the issues. I wanted to try some Matter switches, but I could not get them to pair with Hubitat, even though I followed the proceedure to use the Google Home app on my phone to pair it their first. It would say it was transferring it to Hubitat, but it inevitably failed. I have a Google Home Mini (microphone switched off as I only use it as a speaker). I don't want any cloud-dependent devices/hubs. Maybe I am a paranoid Luddite. Maybe I just don't like the intrusiveness. As for Gemini, no thank you.
If it keeps going in this direction, I am likely to start removing some of the not so smart devices and go back to total, physical control.
I had the same issue with a Govee light strip a week or so ago. It would go through the matter pairing in the HE app but then when it came to adding it to the hub it would just sit and spin. It never would add. It add via matter to Home Assistant with no issues. Then even when Home Assistant would generate the code to bring it into Hubitat via that method (like you with Google) I had to add it three or four times to get it to work. I have since added multiple matter devices to Hubitat via the app with zero issues. I think it is more device issue than it is a Hubitat, Google, Home Assistant etc issue on those.
My opinion is that matter is a camel--a horse designed by committee. It isn't ready for prime time.
You can ask Alexa why she just did what she did.
I agree with those that have mentioned Echo devices don’t spontaneously awaken and speak based on no trigger at all. I am sure there are times when it’s not clear to a nearby human why the device triggered, though.
I'll have to remember that. 
I asked Dum Dum (that's what we call it amongst ourselves so it doesn't spew some random nonsense) a question last week, but didn't quite catch the answer.
When I asked it to repeat the last answer, it said it didn't understand or some such.
I cursed it and walked away.
Hate having to be smarter than my tools.
That is a fair statement. Just seems like some companies are doing better at it than others.
Yep, this works very well. I have only ever had an Amazon Echo 'randomly' start doing something when there is an active conversation going on in a room. Usually, when that happens, I ask everyone to be quiet for a minute, and I ask "Alexa, what did you hear?" She responds immediately with some phrase that she misinterpreted from part of the ongoing conversation.
Other than that, I have NEVER had an Amazon Echo device just start playing music (or similar) randomly.
Now, my kids may have told Alexa to play music in another room, to mess with mom and dad... 
