HelloWebView contains race condition

I based my usage of WebView2 on the HelloWebView.cpp sample, however, a recent windows update (sometime on or before Decmber 11, 2023) broke our application because the startup scripts are no longer executed. We fixed the issue by moving the calls to AddScriptToExecuteOnDocumentCreated to occur before calling Navigate. I recommend updating the samples to do the same (such as https://github.com/MicrosoftEdge/WebView2Samples/blob/85e53c9dc4245ed74fc737554640644d4b0f3bb5/GettingStartedGuides/Win32_GettingStarted/HelloWebView.cpp).

I've investigated a bit more and determined this race condition seems to always occur if you are navigating to a local file URL, i.e.

webview->AddScriptToExecuteOnDocumentCreated(L"console.log('A')", nullptr);
webview->Navigate(L"file:///C:/temp/testpage.html");
webview->AddScriptToExecuteOnDocumentCreated(L"console.log('B')", nullptr);

In that example the first console log will show up, but not the second. If you modify the example to go to an HTTP URL, both will show up.