KDE5: Freezes by moving to sftp

* open Konqueror with a local tab * open a second tab with a sftp destination * selected 40 files * right click -> cut * switch tab * right click -> paste * the complete desktop don't respond * go in the kitchen and smoke a cigarette * come back * the konqeueror window responds * taskbar is still frozen, no switch to a different window * klick around * notification "files are moved...." * desktop responds again reproducable repeatable, well, that will end in smoking 60 cigarettes instead 40 per day............