当我将主题更改为深色然后返回浅色模式时，Getx 会Flutter 更改主题，它不会加载我的自定义主题

Getx flutter when i change theme from light to dark mode and then return to light mode its not returning my custom theme its load old app bar background even theme changes

ThemeData lightTheme = ThemeData(
  useMaterial3: true,
  backgroundColor: Colors.white,
  appBarTheme: AppBarTheme(
    elevation: 1000,
    backgroundColor: Colors.white,
  )
);
ThemeData darkTheme = ThemeData.dark().copyWith(primaryColor: Colors.red);

Getx flutter when i change theme from light to dark mode and then return to light mode its not returning my custom theme its load old app bar background even theme changes


class _MyMaterialAppState extends State<MyMaterialApp> {

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      debugShowCheckedModeBanner: false,
      title: appName,
      theme: lightTheme,
      darkTheme: darkTheme,
      translations: Languages(),
      locale: Get.deviceLocale,
      fallbackLocale: const Locale('en', 'US'),
      home: const MyHomePage(),
    );
  }
}