Map Rhino Z to OBJ Y - Curves wrong mapping

Hi,
I noticed that Map Rhino Z to OBJ Y doesn’t work as it should with curves.

Rhino 8.0.22095.9345

export curve to obj.3dm (311.5 KB)

Hi Jakub -
I’m not seeing that here with your file:
image

Red is original, and black is imported and slightly moved…

Perhaps I need more detailed instructions on how to reproduce that issue?
-wim

Please check this video.