Hi,
My experience with UI.Vision on Windows suggests that when UI.Vision opens an application, it should open it in the foreground. Interesting that the calc.exe program appears behind the UI.Vision window.
I have had problem with this on the macOS but since part of the window is visible, I just use XClick to click on the parts of the window that is visible.
I haven’t tried this before, but you can try using XType and send in the Alt-Tab keystrokes? If you press Alt-Tab once, it should bring you to the most recent application.
Let me know how it goes.
regards,
steven