Pencil tool line not visible while drawing in Glyphs-Mini

I just purchased Glyphs Mini 2.1.4 (114) and am running Mojave 10.14.6 (18G7016). When I select the pencil tool and begin drawing, the line is not visible until after I let go of the mouse button. Needless to say this makes following a background image very difficult if you don’t know where to stop the curve to close it.