Shell menu is responding to system theme changes when an explicit theme is used

[pekspro]

Description

The shell menu is changing background color when the app theme in Windows settings is changed. Even when an explicit theme should be used in the app. It seems to work as expected in Android.

Steps to Reproduce

1. Create a new MAUI app.
2. Setup the app do use the dark theme in App.xaml

<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:MauiIssues"
             UserAppTheme="Dark"
             x:Class="MauiIssues.App">

3. In AppShell.xaml, set Shell.FlyoutBehavior to Locked

<Shell
    x:Class="MauiIssues.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:MauiIssues"
    Shell.FlyoutBehavior="Locked">

4. Go into the Windows settings and set the app theme to dark, and then switch to light.
5. Now the app looks like this:

Full sample project: https://github.com/pekspro/MauiIssues/tree/8582_Shell_menu_is_responding_to_system_theme_changes

Version with bug

6.0.400 (current)

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

Windows 10.0.17763.0

Did you find any workaround?

No

Relevant log output

No response

[pekspro]

Has this been resolved? Seems to work as expected in 6.0.400-preview.22330.6.

[XamlTest]

Verified this on Visual Studio Enterprise 17.7.0 Preview 1.0. This issue does not repro on Android 13.0, repro on Windows 11 with below Project:
MauiApp16.zip

7.0.400-preview.23225.8