Yup, the controller is showing the cursor but the button is set to None:
https://i.gyazo.com/43169b257ad32d8e…b61c83a3ac.mp4
It’s invisible, not non-interactive. If you do not want to interact with widget elements with the mouse cursor, set the elements’ visibility to Hit Test Invisible.
You can override what happens when the cursor leaves / enters widget. You can even override onFocusLost, to force focus back in some weird alt-tab circumstances.