Any CadLwPolyline with a coordinate Of 0,0 ignores that point as valid coordinate. You can use the following example from another post to view the issue. This will render a triangle rather than a rectangle.
using (Cad…...User-defined; 1 = Predefined; 2 = Custom, we support only predefined...gorokhovatskyi February 6, 2025, 8:03pm 2 @kevin.kilburn , we can confirm...