Hi All!
The reason of that only the desktop wallpaper and menu bar is visible is that the LMIGUIAgent.app (the component that is responsible to record the screen) does not have effective Screen Recording permission in System Preferences -> Security & Privacy -> Privacy. The check box might be checked but due to a situation unhandled properly (by the OS) the previously granted permission is lost when some action/events happen (like fast user switching).
We identified the cause of the problem, implemented the fix and plan to release it soon.
