Leonard Senn1,
Thank you for those details.
Let's try disconnecting the hearing aid and testing without them. This will help us further isolate the issue.
These steps will guide you:
"Unpair your hearing device
When you unpair your hearing device from your Apple device, it disconnects and will not reconnect to your Apple device until you pair it again.
- iPhone or iPad: Go to Settings > Accessibility > Hearing Devices. Tap the name of your hearing device, then scroll down and tap “Forget this device.”
- Mac: Choose Apple menu > System Settings, click Accessibility in the sidebar, then click Hearing Devices on the right. Scroll down and tap “Forget this device.”"
Additional details can be found here: Use Made for iPhone hearing devices
Let's also test with multiple songs to verify it's not just a single song it can't identify.
Cheers!