AutoCAD Inventor :: Bend (fillet) Between Two Lines In 3DSketch

I generate 3 points, two lines between point 1,2 and 2,3 and make a bend between the two lines. Cannot do it correctly.

On one side the fillet is not trimmed correctly. I think it is a bug in Inventor. Also when I have the sketch I manually cannot make a decent bend/fillet in the 3D sketch I created.
 
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click 'add 3d sketchpoints in open partdoc Dim oPartDoc As PartDocument Dim oPartDef As PartComponentDefinition Dim oTG As TransientGeometry oTG = _invApp.TransientGeometry oPartDoc = _invApp.ActiveDocument oPartDef = oPartDoc.ComponentDefinition Dim oSketch As Sketch3D oSketch = oPartDef.Sketches3D.Add() Dim sp1(2) As SketchPoint3D Dim rod(1) As SketchLine3D sp1(0) = oSketch.SketchPoints3D.Add(oTG.CreatePoint(0, 0, 10)) sp1(1) = oSketch.SketchPoints3D.Add(oTG.CreatePoint(0, 0, 0)) sp1(2) = oSketch.SketchPoints3D.Add(oTG.CreatePoint(10, 0, 0)) rod(0) = oSketch.SketchLines3D().AddByTwoPoints(sp1(0).Geometry, sp1(1).Geometry) rod(1) = oSketch.SketchLines3D().AddByTwoPoints(sp1(1).Geometry, sp1(2).Geometry) 'bending it oSketch.SketchArcs3D.AddAsBend(rod(0), rod(1), 2.5) End Sub
 
The resulting part-file is added, for who wants to try to get a bend with both sides trimmed correctly.