[regression/8.0.3] Setting a style on a label causes spans with FontAttributes to be ignored on Android

[DamianMehers]

Description

Consider this .NET MAUI 8 XAML:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="TestAndroidSpans.MainPage">
    <ContentPage.Resources>
        <ResourceDictionary>
            <Style TargetType="Label">
                <Setter Property="TextColor" Value="Black"/>
            </Style>
        </ResourceDictionary>
    </ContentPage.Resources>

    <Label HorizontalOptions="CenterAndExpand" TextColor="Gray" >
        <Label.FormattedText>
            <FormattedString>
                <Span Text="{Binding NotBold}"/>
                <Span Text="{Binding Bold}" FontAttributes="Bold" />
            </FormattedString>
        </Label.FormattedText>
    </Label>
</ContentPage>

This generates:

Notice that the Bold span is ignored.

If the Style is removed, everything works as expected:

Steps to Reproduce

Create a new .NET 8 MAUI app and add the above XAML in the MainPage.xaml. Run the app. Notice the missing bold text

Link to public reproduction project repository

No response

Version with bug

8.0.3

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android

Did you find any workaround?

No response

Relevant log output

No response

[samhouts]

Did this used to work in .NET 7.0?

Hi @DamianMehers. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. 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.

[DamianMehers]

Did this used to work in .NET 7.0?

Yes it did. That critical text marked in bold disappeared from the UI of our app moving to .NET 8.0

[LasseOL]

Explicit style seems to work, so this can be used as a temporary workaround.

<Style x:Key="labelBlackTextStyle", TargetType="Label">
  <Setter Property="TextColor" Value="Black"/>
</Style>

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.