Since v 15 and I'm at 15.0.2 my 12 Pro Max needs the music app restarted to resume hearing sound. If I'm playing sound via speakerphone, stop, and lock screen there's no sound after an unlock unless I kill music app and resume.
Hmmm..... No one else experiencing this?
I haven't experienced it, but I'm on iOS 15.1 Beta. Sorry í ½í¸