Small circles in GraphicsPath output

[SLS8]

If I use code like this svgdoc = SvgDocument.Open(...) then I draw svgdoc.Path it creates the correct drawing but it also contains small circles of various (small) sizes which do not correspond to any data in the original svg. Anyone knows why this happens? Thank you
It does it for all files I've tested but here is one sample https://en.wikipedia.org/wiki/File:C_172_line_drawing_oblique.svg
and the generated GraphicsPath