InputNonClientPointerSource.GetForWindowId(AppWindow.Id) window resizing events not fired most of the time

Describe the bug

I assume that InputNonClientPointerSource.GetForWindowId(AppWindow.Id) window resizing events such as EnteredMoveSize are meant to fire when resizing the window. However, these never seem to fire when resizing the window from the bottom or sides, and only occasionally from the top/top corners. It seems maybe the mouse has to be over the title bar for these events to fire. I would expect them to fire reliably when the window is resized, otherwise what is the point in them?

Steps to reproduce the bug

Add an event handler for InputNonClientPointerSource.GetForWindowId(AppWindow.Id).EnteredMoveSize then resize the window from the bottom or sides and observe it is not called.

Expected behavior

Resize events should be called reliably. IMO the WindowRectChanged event should also be called when the window is maximized etc (the docs say it corresponds to WM_WINDOWPOSCHANGED.

Screenshots

No response

NuGet package version

2.1

Packaging type

Packaged (MSIX)

Windows version

Windows 11 version 24H2 LTSC (26100, June Update)

IDE

No response

Additional context

No response

Start by reproducing the issue with an EnteredMoveSize handler on InputNonClientPointerSource.GetForWindowId(AppWindow.Id), resizing from the bottom, sides, and top corners. Trace the implementation of the non-client pointer events and WindowRectChanged behavior; done means resize and maximize operations reliably produce the documented events.