_Box -> _ToSubD conversion issue on creasing

Rhino SubD
1

Hi All,
Just noticed this today. When extruding a Box, I clicked on _ToSubD and found that not all edges remained creased. one edge in particular was uncreased. I tried changing the import choices but still had the same results.
While choosing the import:

extrude box to subd-choosing
extrude box to subd-choosing1225×816 205 KB

After Choosing:

extrude box to subd-chosen
extrude box to subd-chosen520×595 48.7 KB

And the parts pulled apart to make it easier to see.
extrude box to subd-chosen-pulled apart

file:
extrudeBox-SubD-Error.3dm (77.2 KB)

2

Same here. One edge remains uncreased.
7.0.20119.13305

3

Thanks, filed as https://mcneel.myjetbrains.com/youtrack/issue/RH-58161