Siri responds "Continue on the companion device"

We have multiple HomePods and HomePod Minis in my home. I am the primary user on all of them, and they are all signed into my AppleID account. The current OS version on all of them is v18.

If I ask Siri the example phrase, "Siri, what's the weather?" or "What's my current weather?" or "What's my weather forecast?" I get the response, "Okay, David, you have to continue on the companion device."

Why?

Possibly related, if I ask Siri, "Siri, play rain sounds" or "Siri, play forest sounds," the response is, "I couldn't find rain/forest in your music library." Siri no longer knows my music playlist, even though I have an Apple Music subscription and pay for music library syncing.

Most of the example phrases Apple shows on the HomePod webpage haven't worked since the v18 updates. In my experience, Siri has gotten continually worse.

Has anyone else been experiencing similar problems and is there a solution?

Thank you.