Animation Container onend function is not called in Flutter - flutter

Question

Flutter Doctor
[√] Flutter (Channel stable, 2.0.3, on Microsoft Windows [Version 10.0.19042.985], locale en-US)
• Flutter version 2.0.3 at C:\flutter
• Framework revision 4d7946a68d (2 months ago), 2021-03-18 17:24:33 -0700
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[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
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• Platform android-30, build-tools 30.0.3
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• No issues found!
Main Activity Code For Understanding
import 'package:flutter/material.dart';
import 'package:hungers_den/ui/display_screen.dart';
import 'package:hungers_den/ui/splash_screen.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
initialRoute: '/splashScreen',
debugShowCheckedModeBanner: false,
routes: {
'/splashScreen': (context) => SplashScreen(),
'/displayScreen': (context) => DisplayScreen(),
},
);
}
}
Actual code where the problem is (onend function of animation container not being called)
import 'package:flutter/material.dart';
import 'package:hungers_den/colors.dart';
class SplashScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: primaryAppColor,
body: Center(
child: AnimatedContainer(
width: 350,
height: 300,
curve: Curves.easeInOutQuint,
decoration: BoxDecoration(
gradient: RadialGradient(
colors: [Colors.yellow, Colors.transparent],
)),
child: Image.asset("assets/images/logo/hungersden-logo.png",
width: 150, height: 150),
duration: Duration(seconds: 4),
onEnd: () {
print('iam here');
//Navigator.pushNamed(context, "/displayScreen");
},
),
),
);
}
}
onend function of animation container is a callback which should be called after animation completes. i have tried this on two projects but onend print is not printed. also checked with breakpoint that it never goes to onend function idk why.