So, how's this for curious behavior. After more testing, I learned that the white noise was coming from my daughter's "Home" which is outside of my Home and with no connection to my home. Until about a year ago, she lived with me and her devices were a part of my home. When she moved, she left them connected to my home for a period of time and then removed them and created her own home. After that, I removed her as a member of my household. She recently changed the settings on her "Bedroom" speaker which seems to have created the trigger which started the white noise on my speakers. In my home, the Lenovo Clock and the Home Mini speaker where in a group named "Beedroom" and that was the name of a Home Mini in her bedroom. Whenever she issued the command, "Play White Noise on Bedroom Speaker" via a Routine in her Home, the action started on my two speakers called "Bedroom" in my Home.
We don't understand how this could/would happen. Especially after many months of her devices not being in my Home and none of my devices ever having been in her home.
I'm inclined to call this a "Bug".
To resolve, I deleted the Bedroom group and deleted the Home Mini from my Home. Then re-added the Home Mini. After these changes, her home settings are no longer affecting my devices.
