Sometimes, when I close the Windows Notebook app, some processes do not terminate and one of its therads has a relatively high cpu activity of about 20% which heats up my laptop and consumes battery. The resource monitor shows no disk and no network activity. I can end this process in the Task Manager. This happens not always when I use the app. Mostly the Notebook task disappears after closing the app.
I have installed Notebook version 2.1.0.0.  I use Windows 10 Pro 22H2 on a Huawei MateBook Pro.