Animate to page not working on iOS

[Beto-Beto-Salamander]

Describe the bug Animate to page not working, it just scroll to the given date

To Reproduce Here is the code

class ScheduleScreen extends StatefulWidget {
  const ScheduleScreen({Key? key}) : super(key: key);

  @override
  _ScheduleScreenState createState() => _ScheduleScreenState();
}

class _ScheduleScreenState extends State<ScheduleScreen> {
  DateTime _selectedDate = DateTime.now();
  final DatePickerController _controller = DatePickerController();

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance!.addPostFrameCallback((timeStamp) {
      _controller.animateToDate(_selectedDate);
    });
  }

  @override
  Widget build(BuildContext context) {
    final _theme = Theme.of(context);
    SizeConfiguration().init(context);
    return Scaffold(
      body: CustomScrollView(
        slivers: [
          CustomSliverAppBar(
            title:
                "${DateFormat().add_MMMM().format(_selectedDate)} ${DateFormat().add_y().format(_selectedDate)}",
            children: [
              Padding(
                padding: EdgeInsets.only(
                  right: paddingX(5),
                  top: paddingX(2),
                  bottom: paddingX(2),
                ),
                child: ButtonPrimary(
                  paddingVertical: 1.5,
                  buttonColor: _theme.primaryColor,
                  buttonTextColor: AppColors.white,
                  buttonText: "Today",
                  onPressed: () {
                    _controller.animateToDate(DateTime.now());
                    setState(() {
                      _selectedDate = DateTime.now();
                    });
                  },
                ),
              ),
            ],
          ),
          SliverGap(
            height: paddingX(1),
          ),
          SliverToBoxAdapter(
            child: DatePicker(
              DateTime.now().subtract(const Duration(days: 365)),
              controller: _controller,
              initialSelectedDate: DateTime.now(),
              selectionColor: _theme.primaryColor,
              onDateChange: (date) {
                setState(() {
                  _selectedDate = date;
                });
              },
            ),
          ),
          SliverGap(
            height: paddingX(1),
          ),
        ],
      ),
    );
  }
}

Expected behavior 21 October should be active date

Recording https://user-images.githubusercontent.com/77736118/138221572-91e3c9c0-19f3-434e-8358-ac71675ce777.mov

Smartphone (please complete the following information):

• Device: iPhone SE 1st Gen
• OS: iOS 15