Why is EditContext.OnFieldChanged not firing?

I have set up my code as follows:

protected override async Task OnInitializedAsync()
{
	Value ??= new AddressFormPageModel();
	Context = new EditContext(Value);
	Context.OnFieldChanged += OnFieldChanged;
}

private async void OnFieldChanged(object? sender, FieldChangedEventArgs e)
{
	IsValidated = false;
	if (ValueChanged.HasDelegate)
		await ValueChanged.InvokeAsync(Value);
}

And in my razor file I have:

<DxFormLayout >
	<DxFormLayoutItem Caption="Street Address:" Field="@nameof(Value.StreetNumberAndName)" ColSpanMd="12">
		<DxTextBox @bind-Text="@Value!.StreetNumberAndName" 
				   ReadOnly = "@ReadOnly"
		           ShowValidationIcon="true" />
	</DxFormLayoutItem>
...

When I edit the "Street Address:" and exit it, the OnFieldChanged is not called. When I call Submit the Value object is correctly populated with the StreetNumberAndName value.

I did set a breakpoint on the Value.StreetNumberAndName setter and it is set when I tab from that edit box to the next.

Any idea why OnFieldChanged is not being called?

Update:

This is an inner component. It is <AddressForm> in the following:

<EditForm EditContext="EditContext"
		  OnValidSubmit="HandleValidSubmitAsync"
		  OnInvalidSubmit="HandleInvalidSubmitAsync"
		  Context="EditFormContext">
	<ObjectGraphDataAnnotationsValidator />
	<CustomValidation @ref="_customValidation" />
	<DxFormLayout>
		<DxFormLayoutItem Caption="Unique Id:" Field="@nameof(Model.UniqueId)" ColSpanMd="4">
			<DxTextBox @bind-Text="@Model.UniqueId"
					   ReadOnly="@(ModeState != Mode.Create)"
					   ShowValidationIcon="true" />
		</DxFormLayoutItem>

		<AddressForm @ref="_addressElement"
		             ReadOnly="@(ModeState == Mode.Read)"
		             OnValidated="OnAddressValidated"
					 ValueChanged="@OnAddressChanged"
					 Value="@Model.AddressModel">
		</AddressForm>
...

World's shortest answer - the parent EditContext needs to be passed down to the child component. It cannot make its own.

How to do this answered here.