FlyoutItemIsVisible property in Shell Items is always true

Description

The following definition is made within the Shell:

<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="MauiApp4.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:MauiApp4"
    Shell.FlyoutBehavior="Disabled"
    Title="MauiApp4">

    <ShellContent
        Title="Home"
        ContentTemplate="{DataTemplate local:MainPage}"
        FlyoutItemIsVisible="True"
        Route="MainPage" />

    <ShellContent
        Title="NewPage1"
        ContentTemplate="{DataTemplate local:NewPage1}"
        FlyoutItemIsVisible="False"
        Route="NewPage1" />

    <ShellContent
        Title="NewPage2"
        ContentTemplate="{DataTemplate local:NewPage2}"
        FlyoutItemIsVisible="False"
        Route="NewPage2" />

</Shell>

As you can see, only one of the ShellContent has its FlyoutItemIsVisible property set to true.

namespace MauiApp4
{
    public partial class AppShell : Shell
    {
        public AppShell()
        {
            InitializeComponent();

            var list = this.Items.Where(e => e.FlyoutItemIsVisible).ToList();
        }
    }
}

But when I debug the code; all ShellContent items have come to my list variable. When I examine it, the FlyoutItemIsVisible value of all items is True.

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.90 SR9

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

I was not able test on other platforms

Affected platform versions

No response

Did you find any workaround?

Unfortunately

Relevant log output

No response

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