TouchKBRegister causes form to act differently on keyboard show

I'm running on Windows 10 1909. Developing in Visual Studio 2017.

Standard operation, with a form maximized, bringing up the keyboard causes the form to be put into normal state with the form given the area above the keyboard.

But using TouchKeyboardEventManager, adding events for show and hide, now when then keyboard is shown the form stays maximized and the keyboard overlays the form.

I do understand that the example project needs the keyboard and form to act in this way, but I am desperate for show and hide events from the keyboard and the form to act like it does normally (i.e. form goes to normal state).

I can't see what might be causing this in the code. Is what I'm trying to do possible at all?

Start by inspecting the example project and the TouchKeyboardEventManager show and hide event handling described in the issue. Compare the form behavior with and without those events on Windows 10 using Visual Studio 2017. Done means the events remain available while showing the keyboard causes a maximized form to return to its normal state instead of being overlaid.