fullscreen button is not return to normal screen

Hello,
When the video is in fullscreen mode and I click the screen button to return to the normal screen, nothing happens. The video continues in play mode and in full screen. On android and iOS the same problem.
For this reason I am not using the fullscreen feature in the app's production mode.


```
_videoPlayerController1 = VideoPlayerController.network(
snapshot.urlVideo);

_chewieController = ChewieController(
videoPlayerController: _videoPlayerController1,
aspectRatio: 16 / 9,
autoPlay: false,
looping: false,
fullScreenByDefault: false,
allowFullScreen: true,
deviceOrientationsAfterFullScreen: [DeviceOrientation.portraitUp],
// Try playing around with some of these other options:

showControls: true,
materialProgressColors: ChewieProgressColors(
playedColor: Colors.red,
handleColor: Colors.blue,
backgroundColor: Colors.grey,
bufferedColor: Colors.lightGreen,
),
placeholder: Container(
color: Colors.grey,
),
autoInitialize: true,
);
```

Thank you for your help.

Start by reproducing the fullscreen exit failure with the ChewieController configuration shown, on both Android and iOS. Inspect the fullscreen controls and platform-specific orientation handling; done means tapping the fullscreen button reliably returns the video to its normal screen while playback continues as expected.

Written by the indexing model from the issue text.