This is in the patch note:
Unstable Familiar
This ability now heals the caster for 35% of their maximum health when the familiar is killed or toggled off.
(plus stuff like The unstable familiar (as well as the pets from the morphs of this ability) will no longer taunt monsters if the monster is engaged with other player characters.)
So, the unstable familiar and the volatile morph do no heal, only the clannfear? is it working as intended? are the patchnotes wrong?
Frankly, such kind or mistakes lets me believe that the sorc changes from 1.6.4 to 1.6.5 were utterly rushed through, and not at all thought through! and of course, such a nerf to not have been tested before live, why? Also, my lghtning spells cost next to half my magika as a stamina sorcerer, but that's just a personal rant.
I thought using volatile on only 1 bar, and not sacrifice 2 slots for a pet, which I never used yet, and likely will not if the heal is only on clannfear