How "Host Faces" works?

Just try to understand how this works, both wall and floor output null surfaces.

https://discourse.mcneel.com/t/rir-gh-face-edge-of-components/86365/5

host face.gh (11.5 KB)

That’s a bug, those should cast to a Curve or Surface. Sorry for the inconvenience.

Thanks for the reply.
I’ll wait for the new realse…?

I’ll reply to this thread once the fix is in.