FlareActor holds incorrect callback references

[ghost]

Within my app, I'm calling the same FlareActor twice (through a private stateless widget) but with different callback functions. The first callback calls a null (it loops a loading animation so it's not going use the callback either way) and the second time it's a function that notifies that the 'done' animation is complete.

I've modified my code to provide some helpful print statements (including changing the parent).

Stateless Widget (with FlareActor)

class _Splash extends StatelessWidget {
  const _Splash({Key key, this.isLoading = true, this.onComplete})
      : super(key: key);

  final bool isLoading;
  final Function onComplete;

  @override
  Widget build(BuildContext context) {
    print('Flutter: $onComplete');

    return Center(
      child: SizedBox(
        height: 250,
        child: FlareActor(
          "lib/graphics/splash-screen.flr",
          alignment: const Alignment(0, 0),
          fit: BoxFit.contain,
          animation: isLoading ? 'loading' : 'done',
          callback: (_) {
            print('FlareActor: $onComplete');
          },
        ),
      ),
    );
  }
}

Parent Widget (Important bits only)

if (state is SplashScreenLoading) {
  return _Splash(onComplete: () => 'stringType');
}

if (state is SplashScreenSuccess) {
  return _Splash(isLoading: false, onComplete: () => cubit.animationEnded());
}

So I expect the FlareActor to call the new function, but that's not what happens.

Print Statements

I/flutter ( 3231): Flutter: Closure: () => String
I/flutter ( 3231): Flutter: Closure: () => void
I/flutter ( 3231): FlareActor: Closure: () => String

Notice how flutter (and thus the widget) has the reference to the new function (which goes to void) but FlareActor is calling the old function? Am I doing something wrong or is this not intended?

[ghost]

Duplicate of #276