I found solution. Problem was in UIScene when appliaction did to background. AVPictureInPicture need during activation also active UIScene.
I changed Observer to uiSceneWillDeactivate where I activate PiP
NotificationCenter.default.addObserver(
self,
selector: #selector(uiSceneWillDeactivate),
name: UIScene.willDeactivateNotification,
object: nil
)
krenem00
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