Tried to send a platform message to Flutter, but FlutterJNI was detached from native C++. Could not send. Channel: audio_manager. Response ID: 0

[gauravdv]

when app remove from background.

Tried to send a platform message to Flutter, but FlutterJNI was detached from native C++. Could not send. Channel: audio_manager. Response ID: 0

I tried what came my mind, but I could not get something.

//1.
@OverRide
didChangeAppLifecycleState(AppLifecycleState state) {
if (AppLifecycleState.detached == state) {
print("detached"); // it is working I can see this write on console.
await AudioManager.instance.release(); // manually release when no longer needed
}
}
@OverRide
void initState() {
super.initState();
WidgetsBinding.instance.addObserver(this);}

//2
I wrote on dispose() method but it also did not work.

//3
I wrapped my build function with "WillPopScope" but it didn't show me even print

//4
I wrote dispose method of my player page, but that too didn't show me print