[Label] Certain style attributes not applied when using Label.FormattedText

[MAUIoxo]

Description

When I use Label.FormattedText (e.g. to format a string with a localization resource as below), certain style attributes like FontAttributes="Bold"or TextColor="MediumPurple" are ignored when they are used directly on the Label:

<Label FontSize="16" FontAttributes="Bold" TextColor="MediumPurple" Margin="8, 10, 0, 0">
     <Label.FormattedText>
         <FormattedString >
             <Span Text="{loc:Translate SelectItem_LabelHeading}"
             <Span Text=": " />
         </FormattedString>
     </Label.FormattedText>
 </Label>

When they are set on each Span element, e.g. with a style, they are applied, but then an attribute like `FontSize="25" is not applied anymore:

<ContentPage.Resources>
    <ResourceDictionary>
        ...
        <Style x:Key="HeaderLabelStyle" TargetType="Label">
            <Setter Property="FontSize" Value="16"/>
            <Setter Property="TextColor" Value="MediumPurple"/>
        </Style>
    </ResourceDictionary>
</ContentPage.Resources>

...
<Label FontSize="25" Margin="8, 10, 0, 0">
    <Label.FormattedText>
        <FormattedString >
            <!-- Style has to be applied like this on each Span element, otherwise it will be ignored. -->
            <Span Text="Select a value" Style="{StaticResource HeaderLabelStyle}" />
            <Span Text=": " Style="{StaticResource HeaderLabelStyle}" />
        </FormattedString>
    </Label.FormattedText>
</Label>
...

I don't know if this is the intended behavior, but at least from my perspective attributes should be accumulative from top to bottom. So all child elements „inherit“ all the Attributes from their parent first (top to bottom). If a child also sets the same attribute, it should be overwritten for that specific element then.

Therefore, in the snippet above with FontSize="16", all the attributes set on the Label should also be set in the child and therefore be applied to the Span elements.

Steps to Reproduce

1. Use the attached reproducible example in MainPage.xaml
2. Define style attributes like FontAttributes="Bold" or TextColor="MediumPurple" on the Label with the Label.FormattedText
3. See that in this example, an attribute like FontSize="16" is still applied, but other attributes like FontAttributes="Bold" or TextColor="MediumPurple" are ignored on the <Span Text="Select a value" /> and <Span Text=": " /> elements
4. When styles are applied like in the <Span Text="Select a value" Style="{StaticResource HeaderLabelStyle}" /> and <Span Text=": " Style="{StaticResource HeaderLabelStyle}" /> elements, the style attributes FontAttributes="Bold" or TextColor="MediumPurple" are applied, but then a huge FontSize="25" defined on the Label is ignored

Expected behavior is that in both examples all style attributes should be accumulative and applied down to the child Span elements

Link to public reproduction project repository

FormattedLabelTextIgnoresAttributes_27828

Version with bug

9.0.40 SR4

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[Zhanglirong-Winnie]

This issue has been verified Visual Studio 17.14 Preview 1(9.0.40 & 9.0.30). Can repro this issue on Android and iOS platforms.

[dotnet-policy-service]

Hi @@MAUIoxo. We have added the "s/try-latest-version" label to this issue, which indicates that we'd like you to try and reproduce this issue on the latest available public version. This can happen because we think that this issue was fixed in a version that has just been released, or the information provided by you indicates that you might be working with an older version.

You can install the latest version by installing the latest Visual Studio (Preview) with the .NET MAUI workload installed. If the issue still persists, please let us know with any additional details and ideally a reproduction project provided through a GitHub repository.

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.