TextAlignment wrong when switching theme from within a CommandBar secondary command

[ossandust]

When switching between dark and light mode using CommandBar(Toggle)Buttons in the CommandBar.SecondaryCommands section, all text blocks with TextAlignment="Center" are rendered without text centering. The problem does not occur when the CommandBar(Toggle)Buttons are in the PrimaryCommands section.

Minimal sample to reproduce the issue :

    private void CmdDarkMode_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
    {
        Application.Current!.RequestedThemeVariant = ThemeVariant.Dark;
    }

    private void CmdLightMode_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
    {
        Application.Current!.RequestedThemeVariant = ThemeVariant.Light;
    }

<Grid RowDefinitions="auto,*">
	<ui:CommandBar >
		<ui:CommandBar.PrimaryCommands>
			<ui:CommandBarButton IconSource="WeatherMoonFilled" Label="Dark" Click="CmdDarkMode_Click"/>
			<ui:CommandBarButton IconSource="WeatherSunny" Label="Light" Click="CmdLightMode_Click"/>
		</ui:CommandBar.PrimaryCommands>
		<ui:CommandBar.SecondaryCommands>
			<ui:CommandBarButton IconSource="WeatherMoonFilled" Label="Dark theme" Click="CmdDarkMode_Click"/>
			<ui:CommandBarButton IconSource="WeatherSunny" Label="Light theme" Click="CmdLightMode_Click"/>
		</ui:CommandBar.SecondaryCommands>
	</ui:CommandBar>
	<Grid Grid.Row="1" VerticalAlignment="Center">
		<TextBlock Width="200" Margin="5" Background="LightGray" TextAlignment="Center">TEST</TextBlock>
	</Grid>
</Grid>

This happens for instance with all CommandBarButton labels :
After switching theme with a "primary" command :

After switching theme with a "secondary" command :

Desktop/Platform :

• OS: Windows 11 + wasm
• FluentAvalonia Version 2.2.0 (= latest)
• Avalonia Version 11.2.3 (= latest)

Additional context
Not clear under which conditions exactly the bug occurs. For instance when removing the Grid VerticalAlignment in the minimal sample the bug does not occur.