Problem present in Kubuntu 16.10 (plasma 5.8.5, frameworks 5.28.0, qt 5.6.1, widget style: oxygen-gtk), Inkscape 0.92.1 unknown. Workaround from comment #11 NOT helping.
Problem present in Kubuntu 16.10 (plasma 5.8.5, frameworks 5.28.0, qt 5.6.1, widget style: oxygen-gtk), Inkscape 0.92.1 unknown.
Workaround from comment #11 NOT helping.