Quite right, just Beta 3.0 so far.
I think you mean "Track Elevations" not "End-Point Elevations". Yes, there seems to be a problem with location of the Cornu track elevation (and I suspect the Bezier as well). These are located by an algorithm that doesn't take other than Arcs into account. It places others at the mid-point of the bounding box. There will need to be some logic to find the center point of these other types of curve.