OneNote Interop API targets wrong window instance

C# with .NET Framework 4.8, Microsoft OneNote

Open up two OneNote windows viewing the same page. From the second window, invoke an add-in command that uses the managed Interop API.

Any queries or updates made by the API will target the first OneNote window instance, even while the second window instance is active and has focus.

However, if the content of the page is manually modified from the second [active] window instance, then and only then will the API call target and update the page in the second window.

Expectation is that the updated content will be visible immediately in the active OneNote window instance