widget tester cannot tap widget that is on the screen, when has a child rive animation

Question

I have a custom button that runs a Rive animation every x secs, and if pressed will show a modal sheet. The button is wrapped in a gesture detector.

I have a problem testing the button since the tester is failing to tap

my button widget:

  @override
  void initState() {
    super.initState();
    megaMenuDurationIntervalInSeconds = 60;
    _controller = OneShotAnimation(
      AssetPaths.megaMenuButtonAnimationName,
      autoplay: false,
      onStop: () => setState(() => _isPlaying = false),
      onStart: () => setState(() => _isPlaying = true),
    );
    _timer = Timer.periodic(const Duration(seconds: 60), (Timer t) => _runAnimation());
  }

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: widget.dimensions,
      height: widget.dimensions,
      child: RiveAnimation.asset(
        AssetPaths.megaMenuButtonRive,
        onInit: (_) => setState(() {}),
        animations: const [AssetPaths.megaMenuButtonAnimationName],
        fit: BoxFit.contain,
        controllers: [_controller],
      ),
    );
  }

and my test fails

    testWidgets('navigates to checks menu', (WidgetTester tester) async {
      await _buildAndOpenMegaMenu(tester);
      expect(find.byType(MegaMenuButtonRive), findsOneWidget);
      await tester.tap(find.byType(MegaMenuButtonRive));
      await tester.pump();

A call to tap() with finder "exactly one widget with type "MegaMenuButtonRive" derived an Offset (Offset(400.0, 300.0)) that would not hit test on the specified widget.

Basically, calling tap on a widget that has a rive animation doesn't recognize the tap. If I replaced the rive animation with any random widget it works fine. Any ideas why this happens, I have tried several approaches but none worked