WebView2 control in the pages of tabview won't stop after tab was closed

[IShiraiKurokoI]

Describe the bug

The microsoft doc says use code below to close tab

private void Tabs_TabCloseRequested(TabView sender, TabViewTabCloseRequestedEventArgs args)
{
    sender.TabItems.Remove(args.Tab);
}

But if I create a webview tab use the code below(CustomWebPage is a page contains a webview2 control,which will change tabitem header and create new tab dynamically),when I closed the tab, I could still hear the audio of the website playing, and the webview thread can still be seen in the task manager. I know there is a method called "CoreWebView2Controller.Close", but how can I call it? Or is there a simple way to close the tab and dispose(release) all the controls and resources used in it?

            TabViewItem newItem = new TabViewItem();
            newItem.Header = Title;
            Frame frame = new Frame();
            frame.Navigate(typeof(CustomWebPage), new CustomParameter(this, newItem,url));
            newItem.Content = frame;
            TabView.TabItems.Add(newItem);
            TabView.SelectedIndex= TabView.TabItems.Count-1;

By the way, can I obtain the icon of website in webview2 without some complex and unreliable javascript(like the method in wpf: corewebview2.faviconuri)

Steps to reproduce the bug

1. create a window with a tabview
2. use method like above to create a tab with a webview2
3. open some website and play video or audio
4. close the tab
5. media goes on

Expected behavior

No response

Screenshots

No response

NuGet package version

WinUI 3 - Windows App SDK 1.2.3: 1.2.230118.102

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response

[DmitriyKomin]

Hey @IShiraiKurokoI, you can call WebView2.Close in your _TabsTabCloseRequested (that will, among other things, call CoreWebView2Controller.Close, and should synchronously stop web audio playback).