Hey there,
I think the ResampleBspline node is not working as intended. When toggling the close button it is trying to close the spread in a weird way that does seem confusing to me. I added in green how I would think the right closing of the spread would look like with the help of a CubicTo node.
23.02.22_ResampleSplineClosedProblem.vl (36.4 KB)
knoeterich