TabView.CloseButtonOverlayMode not set on new tabs

[Mangepange]

Describe the bug

The value of TabView.CloseButtonOverlayMode is not reflected on new tabs added in runtime. New tabs always have their close button visible.

Steps to reproduce the bug

Using the template studio for WinUI, i updated MainPage.xaml and MainViewModel with the code below.
Tabs added with the "Add"-button show their close buttons.
Switching CloseButtonOverlayMode in runtime (which btw does not seem to respond to binding) seems to effect the existing tabs, but when adding more tabs they always show the close button.

MainViewModel:

using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

namespace App2.ViewModels;
public partial class MainViewModel : ObservableRecipient
{
    [ObservableProperty]
    private ObservableCollection<string> _tabs = new();

    private int _counter = 0;

    [RelayCommand]
    private void Add()
    {
        Tabs.Add($"Content {_counter++}");
    }
}

MainPage.xaml:

<Page
    x:Class="App2.Views.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
    <StackPanel>
        <Button Command="{x:Bind ViewModel.AddCommand}" Content="Add"/>
        <TabView TabItemsSource="{x:Bind ViewModel.Tabs}"
                 CloseButtonOverlayMode="OnPointerOver"/>
    </StackPanel>
</Page>

Expected behavior

Added TabItems in a TabView should respect the CloseButtonOverlayMode property.

Screenshots

NuGet package version

WinUI 3 - Windows App SDK 1.4.3: 1.4.231115000

Windows version

No response

Additional context

No response

[github-actions]

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

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one. Thank you!

Open similar issues:

• WebView2 control in the pages of tabview won't stop after tab was closed (#8193), similarity score: 0.75
• Proposal: Allow overriding/disabling default TabView close tab hotkey (#4930), similarity score: 0.75

Closed similar issues:

• TabView CloseButtonOverlayMode doesn't apply to newly added tabs (#7262), similarity score: 0.97
• TabViewItem close buttons aren't square in Controlsv2 anymore (#6666), similarity score: 0.75

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[twinstar6980]

Observed the same issue on WinAppSDK 1.5.
I need to assign a value to CloseButtonOverlayMode every time I add an item to TabView.
It seems that this problem has existed for at least two years, but MS has not fixed it.

[Mangepange]

Yeah, I fixed it with a Behavior that sets CloseButtonOverlayMode every time TabItemsChanged is triggered.