i tested with LXDE (openbox) and wx3.0.4 gtk2 from Debian backports, kicad 5.0.2, the bug is still there changing the window manager to xfwm4 and the bug doesn't happen
i tested with LXDE (openbox) and wx3.0.4 gtk2 from Debian backports, kicad 5.0.2, the bug is still there
changing the window manager to xfwm4 and the bug doesn't happen