Now on the working server we have a user reporting an issue where X2Go loses "focus".  He gets a high-pitched clicking sound as he's typing in a window
running under X2Go, e.g., an emacs window.  When this happens, he needs to click someplace in the window in which he was working.

He's using High Sierra with the x2goclient-4.1.1.1.git20171106.1697.heuler.OSX_10_12.dmg version.