Let's say I have a polyline with material set to PolylineArrowMaterial and the width is set to 60. It looks like the meaning of the width here is the width of arrow, not the polyline. Then, we I change the material to the CesiumColor. At that point the width is the width of polyline - so the line becomes thicker. This means that if the user turns the arrow of polyline on/off I also have to reset width.
Is this intentional behavior or a bug?