Is Seabreeze working as intended?

Hi folks,

I just got myself a decent Seabreeze from the Shrine of the Storm, but it does not seem to be procing off healing spells. Off damaging spells, it works just fine.

is this intentional? Or am i just super unlucky on healing procs?

wowhead::
https://www.wowhead.com/item=158371/seabreeze&bonus=4777:1482