[Problem/Bug]: Request to WASM file is not resolved to virtual host sometimes

What happened?

Configuration: I'm developing a WinUI3 application running a WebView2 to open pspdfkit viewer. For that, I create a virtual host mapping to a directory where the library files are located

var folder = Path.GetDirectoryName(indexPagePath);
var index = Path.GetFileName(indexPagePath);

webView.CoreWebView2.SetVirtualHostNameToFolderMapping(host, folder, CoreWebView2HostResourceAccessKind.Allow);
webView.CoreWebView2.Navigate($"http://{host}/{index}?{query}");

The host value is app-beta.ourdomain.com

Problem: Recently we've started experiencing a weird issue. Upon library initialization it sends a lot of requests to source files. Two of those are *.wasm and *.wasm.js and they fail with 404. In the dev tools I see that it actually gets resolved to a real IP address of our host instead of being mapped to the local folder.

Which makes it even more weird is that if I click "Edit and Resend" the request works just fine.

Regression: It used to work fine when we were releasing the app. The issues was first noticed last week. Gradually it affected most of our users. Can it be a windows update?

Importance

Important. My app's user experience is significantly compromised.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

129.0.2792.65

SDK Version

1.0.2210.55

Framework

WinUI3/WinAppSDK

Operating System

Windows 11

OS Version

22631.4169

Repro steps

Explained in "What happened". Let me know how I can assist

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 WebView2 virtual host mapping and navigation described in the report, then trace the failing .wasm and .wasm.js requests in the developer tools. Compare the initial requests with the successful Edit and Resend behavior; done means both requests consistently resolve to the mapped local folder instead of the real host IP.