BindingMode.Create crashes with Call was not intercepted - what am i doing wrong?

[DullingWine]

I'm trying to convert my reflection based multiple property bindings to strongly typed ones, but they straight up crash. For example:

              new Label()
                .Bind(Label.TextProperty,
                binding1: BindingBase.Create(static (BillViewModel vm) => vm.Bill.StartDate),
                binding2: BindingBase.Create(static (BillViewModel vm) => vm.Bill.EndDate),
                convert: ((DateOnly StartDate, DateOnly EndDate) values) =>
                    $"{values.StartDate:MM-dd-yy} - {values.EndDate:MM-dd-yy}")

(obviously using community markup)

Above crashes with:

System.InvalidOperationException: Call to Create<ViewModels.BillViewModel, System.DateOnly>() was not intercepted.
at Microsoft.Maui.Controls.BindingBase.Create[BillViewModel,DateOnly](Func`2 getter, BindingMode mode, IValueConverter converter, Object converterParameter, String stringFormat, Object source, Object fallbackValue, Object targetNullValue)

Note this works if i used reflection based methods:

                    binding1: new Binding(nameof(BillViewModel.Bill) + "." + nameof(Bill.StartDate)),
                    binding2: new Binding(nameof(BillViewModel.Bill) + "." + nameof(Bill.EndDate)),

Single parameter strongly typed binding is also fine.

I must be doing something wrong? Can anyone tell what? This is latest Maui (dotnet 9).

Thank you in advance!

[stephenquan]

Are you setting BindingContext? If not, then, perhaps you need source, for example source: billViewModel.Bill ?

[DullingWine]

The class is instantiated through a data template (collection view) and that takes care of setting the BindingContext. I don't need source here (or shouldn't, and it doesn't work make a difference anyway). Single binding works fine using for example

new Label().Bind(Label.TextProperty,
                        static (BillViewModel vm) => vm.Bill.DurationDays, stringFormat: "({0} days)")

Problem seems to be specifically using BindingBase.Create