When running QMapShack with KDE 5 (plasma 5), moving the map with the mouse (dragging) does not work. Instead it has a 'drag effect' on the whole window, i.e. it resizes (if initially maximized) or moves the window. A work-around is Ctrl+Drag, but this is not consistent and therefore not what one would expect. Using KDE 4 behaviour is as expected.
Tested with openSUSE tumbleweed / KDE / plasma 5 / QMapShack 1.2