Loft/PlanarSrf/Join bug?

Here is a problem I stumbled across. Rather than extruding, I did a loft between these two polycrv and tried to cap. It would not cap.

  1. Select both curves
  2. Loft
  3. Planarsrf
  4. Join

It creates a bad object.

Problem Loft 2.3dm (3.3 MB)

Hello - running SimplifyCrv on the curves before Loft lets that work but I do not yet know why. For some reason the loft does not close at the curve seam point.

RH-57918 Loft leaves open edges