[Problem/Bug]: In IFrame, when WebResourceResponseReceived , var res = await e.Response.GetContentAsync() will make thread suspend

What happened?

The scenario is as follows:
within an HTML page (index1.html), there exists an IFrame that has its own index2.html.
In the CoreWebView2_FrameCreated event, I have added a WebResourceResponseReceived handler, which successfully gets called back.
wbiframe.WebResourceResponseReceived += Wbiframe_WebResourceResponseReceived;

Debug.WriteLine($"IFrame:{e.Response.StatusCode} {e.Request.Uri}");
var patHasIndex = @"index\.html\?";
var found = Regex.IsMatch(e.Request.Uri, patHasIndex, RegexOptions.IgnoreCase); 
var found2 = e.Request.Uri.Contains("index.html");
if (found2)
{
    Debug.WriteLine("step 1>>>>>>>>>>>>>>> found " + found);
    //todo: find  .data .wasm index.txt 
    //  var res2 = e.Response.GetContentAsync().Result;   //  it gets stuck or hangs.
    Debug.WriteLine("step 2>>>>>>>>>>>>>>> GetContentAsync.result " + e.Response.Headers.GetHeader("Content-Type"));
    var res = await e.Response.GetContentAsync();  // it's better, but never run to step 3
    Debug.WriteLine("step 3>>>>>>>>>>>>>>> GetContentAsync " + found);  //Never reaches here 
    StreamReader sr = new StreamReader(res);
    var html = await sr.ReadToEndAsync();
    Debug.WriteLine("step 4>>>>>>>>>>>>>>> ReadToEndAsync ");

    var r1 = Regex.Match(html, @"[a-f0-9]{32}\.data", RegexOptions.IgnoreCase);
    Debug.WriteLine("step 5>>>>>>>>>>>>>>>" + r1.Value);

I'm using to fetch the content of the outer HTML ,it works fine. However, it gets stuck only when fetching the content within an iframe.

webview2 1.0.2365.46
.net framework 4.8

Importance

Blocking. My app's basic functions are not working due to this issue.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

No response

SDK Version

No response

Framework

Winforms

Operating System

Windows 10

OS Version

No response

Repro steps

in IFrame,

WebResourceResponseReceived

await e.Response.GetContentAsync();

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response

Start with the WebResourceResponseReceived handler added in CoreWebView2_FrameCreated and reproduce the WinForms case on .NET Framework 4.8 with an outer HTML document and an iframe. Check whether e.Response.GetContentAsync() completes for the iframe while the equivalent outer-document request succeeds, using the supplied logging points. Done means the iframe behavior is explained and a confirmed resolution or reproducible limitation is documented.