Sound Check does not normalize volume in the Apple Music Windows app.

I am using the Apple Music app on a PC running Windows 11. The volume is fluctuating wildly between tracks. Some are whisper-quiet while others explode out of the speakers. I have to manually adjust the volume for almost every song.

I have Sound Check turned on, but it is not normalizing the volume. It's having no effect whatsoever. My question is: Is this a bug? A Windows 11 problem? An issue with the app version? Or am I missing something?