HomePods no longer understand basic commands

When I play Apple Music on my HomePods (one older HomePod, three HomePod Minis) and tell Siri to "I don't like this song," Siri replies "I found some web results you can view if you ask again from your iPhone," or something similar. As recently as October of this year this command worked fine. Siri used to mark the song as "Suggest Less like this" and skip it when given the same command. Other simple commands that the HomePods used to understand, like "play CPR Classical" or "I like this song," also no longer work.

All the devices are running the latest version of the HomePod software, 18.2.

The voice commands to Siri work as they should on my iPhone. It's super frustrating that they no longer work on the HomePods.

Anyone have a fix for this?