Picker ItemDisplayBinding doesn't work with compiled bindings

[davidortinau]

Description

When I use ItemDisplayBinding in 8.0.80 nightly or .NET 9 Preview 7, the picker doesn't populate as I'd expect.

I can get around it using a ToString override on the model, or by providing the x:DataType=models:VocabularyList.

The ContentPage does specify a x:DataType for the view model. This doesn't work:

<Picker x:Name="VocabPicker" 
    ItemsSource="{Binding VocabLists}"
    ItemDisplayBinding="{Binding Name}"                    
    SelectedItem="{Binding VocabList, Mode=TwoWay}" />

This does work:

<Picker x:Name="VocabPicker" 
    ItemsSource="{Binding VocabLists}"
    ItemDisplayBinding="{Binding Name, x:DataType=models:VocabularyList}"                    
    SelectedItem="{Binding VocabList, Mode=TwoWay}" />

Steps to Reproduce

https://github.com/davidortinau/SentenceStudio/blob/main/src/SentenceStudio/Pages/Lesson/LessonStartPage.xaml

My testing with the original code:

8.0.71 - Debug - Good
8.0.71 - Release - Good
8.0.80 - Debug - Sad
8.0.80 - Release - Good

Link to public reproduction project repository

No response

Version with bug

Nightly / CI build (Please specify exact version)

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.61 SR6.1

Affected platforms

iOS, Android, Windows, macOS

Affected platform versions

No response

Did you find any workaround?

Yes, as described

Relevant log output

No response

[github-actions]

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

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