I missed an amendment to my feature Illumos when porting from ZOL because ZOL hasn't reflected the amendment.
As a matter of fact this amendment was hard to come by because the commit doesn't reference the feature it amends, Thank you to Toomas Soome for pointing us in the right direction in the mailing list.
Illumos bug: https://www.illumos.org/issues/10205
Illumos commit: https://github.com/illumos/illumos-gate/commit/247b7da039fd88350c50e3d7fef15bdab6bef215