How do I stop the Music app from opening automatically?

Hi buckrymkus,

This wouldn't be expected behavior. There are a few steps you can try when experiencing unexpected behaviors.

1. Restart your Mac. Restating can refresh your Mac and the process when they are behaving unexpected. Check out how to restart here: Shut down or restart your Mac - Apple Support
2. Check for any macOS updates. Updates contain bug fixes and features updates that can help your Mac to work as expected. Check out how to update your Mac here: Update macOS on Mac - Apple Support

Hope that helps!

I don't believe this is a bug. This seems to be a feature. When Bluetooth headphones are connected music always opens and starts playing without prompting. It's annoying and has been annoying users for years. There doesn't seem to be a way to uninstall the music application nor is there a setting in preferences to suppress this.