Why is my HomePod making Windows sound even when disconnected?

My homepod is make the windows notifacation chime shound randomly. When nothing is conected and no windows device is turned on in the hosehold.

Fist I tried restarting, did not work.

Then I reset my apple ID password, removed all device's and reset the homepod itself. That did not work.

I have two factor authentication on in my account and no unknown devices are linked to the account and all devices includeing the homepod are on the latest available software update.

Dose anyone have any tips

link the the same sound it is makeing https://youtu.be/gfaUcs6gsBY?si=84yw5-jqQyY4affh

[Re-Titled by Moderator]