TitleBar windows - Minimise/ close buttons become invisible with theming

[IeuanWalker]

Description

Cant see any properties to control the built in windows buttons, when changing the theme of the app the buttons become invisible -

2026-02-09.22-05-36.mp4

Steps to Reproduce

Set the app.xaml.cs to the following -

public partial class App : Application
{
	Window? _mainWindow;

	public App()
	{
		InitializeComponent();
	}

	protected override Window CreateWindow(IActivationState? activationState)
	{
		_mainWindow = new Window(new MainPage())
		{
			Title = "Cockpit",
			TitleBar = new TitleBar
			{
				BackgroundColor = Color.FromArgb("#181818"),
				ForegroundColor = Color.FromArgb("#CCCCCC"),
				HeightRequest = 48
			}
		};

		return _mainWindow;
	}

	public static void UpdateTitleBarTheme(string theme)
	{
		App? app = Current as App;
		if(app?._mainWindow?.TitleBar is TitleBar titleBar)
		{
			if(theme == "light")
			{
				titleBar.BackgroundColor = Color.FromArgb("#F8F8F8");
				titleBar.ForegroundColor = Color.FromArgb("#3B3B3B");

				// Update button text color
				if(titleBar.TrailingContent is HorizontalStackLayout stack &&
					stack.Children.FirstOrDefault() is Button btn)
				{
					btn.TextColor = Color.FromArgb("#3B3B3B");
				}
			}
			else
			{
				titleBar.BackgroundColor = Color.FromArgb("#181818");
				titleBar.ForegroundColor = Color.FromArgb("#CCCCCC");

				// Update button text color
				if(titleBar.TrailingContent is HorizontalStackLayout stack &&
					stack.Children.FirstOrDefault() is Button btn)
				{
					btn.TextColor = Color.FromArgb("#CCCCCC");
				}
			}
		}
	}
}

Call UpdateTitleBarTheme withing the app somewhere

Link to public reproduction project repository

No response

Version with bug

10.0.30

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Windows

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[nivetha-nagalingam]

This issue has been validated using Visual Studio 18.2.0 with MAUI versions 9.0.0, 9.0.120, 10.0.0 , 10.0.30 and 10.0.31, and it is reproducible on the Windows platform.

Issue33975.zip

Screen.Recording.2026-02-10.at.1.46.02.PM.mov

[karthikraja-arumugam]

The issue will be resolved by the fix included in PR #31714.

[sheiksyedm]

@IeuanWalker The PR #31714 is included in the latest maui version(10.0.40). Please check with the latest version and update here if the issue still reproduces.

[IeuanWalker]

Thanks @karthikraja-arumugam and @sheiksyedm after looking at the linked PR i had to add the following to my app -

app.UserAppTheme = theme.Equals(ThemeEnum.Light) ? AppTheme.Light : AppTheme.Dark;