My keyboard setting in xfce (same in twm and icewm) switched to english after a restart of the notebook (HP ZBook 15 G2 A30). Locale settings are still German, and console by ctrl-alt-f7 still has gernan keyboard. Plasma has it, too.
Actually english keyboard settings on a german keyboard are annoying, any way to switch it back? My suspicion is that it is some window manager default as plasma is using KWin while xfce etc use Xfwm4. But I did not find where to set it. None of the settings inside xfce has any effect.