Different results when calculating curve offsets

Hey there,

so i stumbled again upon this strange behaviour in RhinoCommon using Python and i`m wondering where it is originating from.

When offsetting the same curve with Curve.Offset or Curve.OffsetNormalToSurface the results are different on a suprisingly big scale. The underlyling surface is not really complex. Can somebody explain to me what is happening and if there is a fix ?

Attached i’m sending you the script and the geometry.
CurveOffset_Sample.3dm (95.9 KB) Curveoffsets_3ax.py (3.0 KB)

Thanks

Patrick

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