Xamarin.forms: Label with FormattedString not updated!

[toumir]

Description

Hi,
the same data bound to Label, one without FormattedString and the Other with FormattedString respectively
when updating the Data in code behind, the Label with FormattedString not updating, is this intended ?

Expected Behavior

data update

Actual Behavior

data not updating when it changed programmatically (in code behind)

Basic Information

• IDE: VS
• Platform Target Frameworks:
  
  
  
  • Android: 6.0
  
  
  • iOS: not tested
  
  
  • UWP: not tested
  
  

Screenshots

Reproduction Link

update the data in code behind
XAML

//...
<Label>
    <Label.FormattedText>
        <FormattedString>
            <Span Text="MyData : " TextColor="Blue"/>
            <Span Text="{Binding Data}"/>
        </FormattedString>
    </Label.FormattedText>
</Label>

<Label Text={Binding Data}/>
//...

[StephaneDelcroix]

default binding mode for Span.Text is OneTime. use {Binding Data, Mode=OneWay}

if that doesn't fix it, please reopen