Using Label's Style in ContentPage.Resources or not, it makes different appearance

[cotrasys]

Description

I tested on .NET8 MAUI latest 8.0.70 and GA 8.0.3, can't solve this issue.

Here is a picture (I didn't test it on Mac, sorry)	Using Style in styles.xaml	Using Style from ContentPage

I tried .NET7 MAUI 7.0.101, it seems to use same fonts and no issue.	Using Style in styles.xaml	Using Style from ContentPage

Steps to Reproduce

1. Clone this project and build / run app.
2. Check each pages. You can switch page by button.

You can reproduce by below step without cloning.

1. Create new project and place the Label control use to 'SubHeadline' style on MainPage, like this

           <Label Style="{StaticResource SubHeadline}" Text="abcdefghijklmnopqrstuvwxyz" />
           <Label Style="{StaticResource SubHeadline}" Text="ABCDEFGHIJKLMNOPQRSTUVWXYZ" />
           <Label Style="{StaticResource SubHeadline}" Text="!#$%'()*+,-./:;=?@[\]^_`{|}~" />

2. Copy that MainPage and give another name, write down Label's style on ContentPage.Resouces

   <ContentPage.Resources>
       <ResourceDictionary>
           <!--  This equals to SubHeadline  -->
           <Style TargetType="Label">
               <Setter Property="TextColor" Value="{AppThemeBinding Light={StaticResource MidnightBlue}, Dark={StaticResource White}}" />
               <Setter Property="FontSize" Value="24" />
               <Setter Property="HorizontalOptions" Value="Center" />
               <Setter Property="HorizontalTextAlignment" Value="Center" />
           </Style>
       </ResourceDictionary>
   </ContentPage.Resources>

3. Build & run the app, confirm the different font with comparing the pages

Link to public reproduction project repository

https://github.com/cotrasys/LabelStyleFontIssue

Version with bug

8.0.70 SR7

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

7.0.101

Affected platforms

iOS, Android, Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

No response

[github-actions[bot]]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

Open similar issues:

• Style applied to Label displays different if using Text or FormattedText (#13977), similarity score: 0.85
• [regression/8.0.3] [Windows][CollectionView]Label Disappear when set Style in ContentPage.Resources (#19209), similarity score: 0.83
• [regression/8.0.3] Setting a style on a label causes spans with FontAttributes to be ignored on Android (#19190), similarity score: 0.78

Closed similar issues:

• Label not respecting Font Family setup if using FormattedText (#16193), similarity score: 0.76
• Android Systemfonts (light/black etc.) not working (#19556), similarity score: 0.75

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[ninachen03]

This issue has been verified and repro on Visual Studio 17.11.0 Preview 4.0 (8.0.70 & 8.0.3)

[cotrasys]

Is related on this issue? #19882 This occured from Version 8 and says about Resources problem.

[cotrasys]

I tested on Mac 8.0.70 using VS2022 Mac 17.6.13, it has same issue as other platforms.

Using Style in styles.xaml	Using Style from ContentPage

@samhouts could you add the label of "platform/macOS" ?