WebViewHandler OnProgressChanged not called on Android when loading/navigating WebView

[LeoJHarris]

Description

OnProgressChanged is not being called using the following Handler setup and loading WebView

public class CustomWebViewHandler : WebViewHandler
{
    private CustomWebView? Element => VirtualView as CustomWebView;

    protected override void ConnectHandler(Android.Webkit.WebView platformView)
    {
        base.ConnectHandler(platformView);

        if (Element is not null)
        {
            platformView.SetWebChromeClient(new CustomWebChromeClient(Element));
        }

        platformView.Settings.JavaScriptEnabled = true;
    }

    private class CustomWebChromeClient(CustomWebView customWebView) : WebChromeClient
    {
        public override void OnProgressChanged(Android.Webkit.WebView? view, int newProgress) => customWebView.UpdateProgress(Math.Round((double)newProgress / 100, 2));
    }
}

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.90 SR9

Is this a regression from previous behavior?

No, this is something new

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 14

Did you find any workaround?

WebViewRenderer still works which I've rolled back to.

public class CustomWebViewHandler(Android.Content.Context context) : WebViewRenderer(context)
{
    protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
    {
        base.OnElementChanged(e);

        if (Control == null)
        {
            return;
        }

        if (e.NewElement is CustomWebView customWebView)
        {
            Control.SetWebChromeClient(new CustomWebChromeClient(customWebView));
        }

        Control.Settings.JavaScriptEnabled = true;
    }

    private class CustomWebChromeClient(CustomWebView customWebView) : WebChromeClient
    {
        private readonly CustomWebView _customWebView = customWebView;

        public override void OnProgressChanged(Android.Webkit.WebView view, int newProgress) => _customWebView.UpdateProgress(System.Math.Round((double)newProgress / 100, 2));
    }
}

Relevant log output

No response

[ninachen03]

Could you provide us with a sample project so we can investigate it further? Looking forward to your reply!

[dotnet-policy-service]

Hi @LeoJHarris. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.