I've gotta say I did submit a critical SpriteKit bug in iOS 9, and Music feedback in iOS 7 because I wanted back the Artist ➜ Album ➜ Song hierarchy (which came back a year or two later I think), and I was so disappointed by the replies.Then actually respond and fix the bugs.
For example, this happened to me twice : they released a new beta with absolutely no note whatsoever regarding the Music app in the release notes, and he was asking me : could you confirm your feed-back is still valid in this beta?
Hum.
DUH it's still valid, you didn't change a single thing at all in the app.
I hope it's different today.