[BUG]Not proper Fullscreen on 7.0.0+2 and orientation changes

[vipinnegi90]

Made an app to run on portrait mode using this code :
SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]) .then((_) { runApp(MyApp()); });

When I fullscreen the player it looks something like this:
Fullscreen shot bug

When I try exiting fullscreen with back button, the app is now locked in landscape orientation and neither rotates back to portrait on tilting device. Auto-rotate is turned-on in system settings.

Expected behavior
FullScreen should be exclusive and shouldn't override the app's orientation to change.

[faslurrajah]

did you solve this?