HomePod plays wrong station

We bought our HomePod Minis primarily to play our favorite radio station, All Classical Portland. That is the exact name by which it is listed in TuneIn.

If we ask the HomePod to play that station, we are as likely to get rap music or hip-hip, or at best some other station with classical music. Asking for the call letters doesn't work, either.

If, however, Siri on our iPhones think we're talking to it, the station plays on our iPhones.

Anybody have a fix for this?