I have the new iPhone 6s Plus and I'm having an issue where streaming audio will stop once the screen turns off no matter what app I use and no matter if I stream to the Apple TV or Chromecast. Here are some examples: 1) Using the Apple Music app, I play some music and stream it to the Apple TV via Airplay. It plays fine until the screen either goes off by itself or if I hit the power button to turn the screen off. Stops instantly. Same thing with any other music streaming app like Google Music. 2) Using the Google Music app, I stream audio to my Chromecast and it plays fine too until the screen goes off. The music will stop as soon as the screen is off no matter if I stream via Airplay on the Apple TV or using the Chromecast. The only way I can keep it playing is if I either 1) turn off screen lock, or 2) plug in my phone and leave the screen on (it dims but stays on). Obviously this is not a solution because many times I want to have the phone in my pocket when streaming the music. And I don't want the screen to stay on while I'm streaming music. My iPhone 6 Plus didn't have this problem, but it's gone now so I can't say whether it's the phone itself or iOS 9. I was running iOS 9.01 and now I am on the iOS 9.1 Beta 3 and it's still doing it. This can't be the way Apple intends on Airplay working, right? I read elsewhere that developers just need to update their apps for iOS 9 for this to work. But even Apple's own Music app is doing it, so it has to be a bug in iOS 9, right? Others having this issue? My phone was set up as new, not restored, so there aren't any residual issues from a restored backup. Thanks!