AVPlayerViewController pops entire stack of view controllers when closed - swift

Question

I am using an AVPlayerViewController to display video content within my application. This player can be reached via a sequence of views. The sequence is embedded in a navigation view controller. The problem I have is that whenever I close the player the entire stack of view controllers is popped from the list of view controllers in the navigation controller which means that I am sent back to my home screen (however I only want to pop the AVPlayerViewController from the list and return to the screen before). I tried to find a way to override the close Button but did not find a way. Moreover I tried to push a notification and handle it in the home screen by reinitializing the entire stack of view controllers - this solution works but does not seem like the appropriate solution. I attached the class that inherits from AVPlayerViewController and the code that implements the viewController. Thankful for any hint.
import UIKit
import AVKit
import AVFoundation
// MARK: - EduMediaVideoViewController
class EduMediaVideoViewController: AVPlayerViewController, EduMediaViewController {
// MARK: Stored Type Properties
weak var eduMediaDelegate: EduMediaElementDelegate?
var videoMedia: VideoMediaElement?
// MARK: Lifecycle Methods
override func viewDidLoad() {
super.viewDidLoad()
setUpVideo()
}
// MARK: Instance Methods
func setContent(content: MediaElement) {
guard let videoMedia = content as? VideoMediaElement else {
return
}
self.videoMedia = videoMedia
}
// MARK: Private Instance Methods
private func setUpVideo() {
let playerItem = videoMedia?.video
let player = AVPlayer(playerItem: playerItem)
self.player = player
player.play()
}
private func updateVideoProgress() {
self.eduMediaDelegate?.updateProgress(id: 1, progress: 1)
}
}
// create an extension of AVPlayerViewController
extension EduMediaVideoViewController {
// override 'viewWillDisappear'
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
guard let category = eduMediaDelegate?.getCategory() else {
return
}
let dict = ["category": category]
NotificationCenter.default.post(name: .kAVDismissNotification, object: nil, userInfo: dict)
}
}
extension Notification.Name {
static let kAVDismissNotification = Notification.Name.init("dismissing")
}
The code that initializes the video controller:
let eduVideoViewController = EduMediaVideoViewController()
eduVideoViewController.setContent(content: mediaElement)
eduVideoViewController.eduMediaDelegate = self
navigationController?.pushViewController(eduVideoViewController, animated: false)