ExtendCrvOnSrf - bug?

In the attached, Extend curve on surface with the red lines extends to the natural edge of the underlying surface, ignoring the trim. Has it always been that way? I don’t recall…

Thanks, --Mitch

ExtendOnSrf.3dm (79.3 KB)

Hi Mitch I don’t think it’s supposed to be that way, and it is pretty weird how two of the curves stop at the hole but ignore the outer trim…