#118 Incomplete signal drawing

[Ilia Lilov]

There is a draft file in the attachment which exposes the bug. To reproduce, try to press some times different buttons from the labeled column at the left (but don't press the same button twice - such action will not cause the bug). In the half (approximately) of presses you will see light-green (1) or error signal from the button doesn't propagate to the input of the next element, it "stops" at the random place of wire. This place, actually, depends on scale (I recommend 75% to see quit weird case), so I believe it is drawing bug.
I've attached the whole circuits, because when I try to cut off "excess" parts, bug disappears.

[Ilia Lilov]