Looks like disabling klipper (Whonix Forum) isn’t such a great idea. Would cause an issue…
Is it normal that text in the clipboard gets lost?http://osdir.com/ml/kde-users/2013-06/msg00001.html
Rather than disabling it, clearing contents on shutdown. commit:
https://github.com/Whonix/kde-privacy/commit/751185a86a22d3710fabfa5e5d56dc22d2868515