MaskedNumericInput ComptyContent dosent work with<Value> tag expened

[ofir]

I have this property

private double? _netFreqValue;
public double? NetFreqValue
{
    get => _netFreqValue;
    set
    { 
        if(_netFreqValue == value) return;
        _netFreqValue = value;
        this.OnPropertyChanged();
    }
}

and im trying to set the EmptyContent property to nothing(empty string) when the value is null

this works fine

<RadMaskedNumericInput
    Mask = "#4.3"
    AllowInvalidValues = "False"
    EmptyContent = ""
    UpdateValueEvent = "LostFocus"
    Value = "{Binding NetFreqValue, Mode=TwoWay, UpdateSourceTrigger = PropertyChanged}" />

but this does not

<RadMaskedNumericInput

    Mask = "#4.3"
    AllowInvalidValues = "False"
    EmptyContent = ""
    UpdateValueEvent = "LostFocus">
    <RadMaskedNumericInput.Value>
        <Binding Path=""NetFreqValue"
                         UpdateSourceTrigger="PropertyChanged"
                          Mode="TwoWay">
            <Binding.ValidationRules>
              //some validations
             </Binding.ValidationRules>
        </Binding>
      </RadMaskedNumericInput.Value>
</RadMaskedNumericInput>

how can i solve it?
thanks

[Martin Ivanov]

I've tested the posted code, but it works as expected on my side. You can check this in the attached project.