HomePod randomly plays music

Hello xXEXDXx,

Do you have other devices or people in your home that would be able to connect to your HomePod and play music? If so, you may want to use the steps in the section "Require a password to play audio on HomePod" from the article here: Play audio on HomePod using an iOS or iPadOS device - Apple Support

Also, in the article the section "Allow others to control audio on HomePod" mentions the following:

"Allow others to control audio on HomePod

1. In the Home app on your iOS or iPadOS device, tap , then tap Home Settings.
2. Note: If you have more than one home, you see settings for your current home (based on your location). To edit a different home, tap Homes, then tap the home you want to edit.
3. Tap Allow Speaker & TV Access and choose one of the following options:

• Everyone: Gives access to everyone nearby.
• Anyone On the Same Network: Gives access to those connected to your Wi-Fi network.
• Only People Sharing This Home: Gives access to those you’ve invited to share your home (in the Home app) and who are connected to your Wi-Fi network."

Using these steps you'll want to check your current sharing options. If the issue continues, test a normal restart of your HomePod using the section "Restart HomePod" here: Change HomePod settings

Cheers.