NavigationStarting and NavigationCompleted do not occur at certain sites.

What happened?

When navigating at a specific site
・NavigationStarting
・NavigationCompleted
events are not fired when navigating a specific site.

Importance

Moderate. My app's user experience is affected, but still usable.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

1.0.2592.51

SDK Version

129.0.2792.89

Framework

Winforms

Operating System

Windows 11

OS Version

22631.4317

Repro steps

reference data
https://learn.microsoft.com/ja-jp/microsoft-edge/webview2/concepts/navigation-events

Behavior during [tag] navigation on the web in a normal site
Step1. NavigationStarting
Step2. SourceChanged
Step3. ContentLoading
Step4. HistoryChanged
Step5. BasicAuthenticationRequested
Step6. DOMContentLoaded
Step7. NavigationCompleted

For the site https://and-engineer.com/topics/page/1
Step1. SourceChanged
Step2. ContentLoading
Step3. HistoryChanged
Step4. BasicAuthenticationRequested
Step5. DOMContentLoaded

URL cancellation cannot be performed because NavigationStarting does not occur.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

SDK 1.0.2592.51 Runtime 129.0.2792.89

Start with the WebView2 navigation-events reference and reproduce https://and-engineer.com/topics/page/1 using the listed SDK, runtime, WinForms, and Windows versions. Compare the observed event sequence with the normal-site sequence and determine why NavigationStarting and NavigationCompleted are absent; done means the behavior is explained and a reproducible fix or confirmed runtime issue is documented.