Tender Embrace not activating with Coward's Legacy/Cursed with Vulnerability

Coward's Legacy: You count as low life when cursed with vulnerability.

Tender Embrace: While you are on low life, this graft will periodically apply a buff...

Leveling with Coward's Legacy/Light radius stacking, thought it would be an easy way to stay at full end charges since the gear for light radius stacking is abysmal for stats and life.

Tender Embrace does not activate.

I validated the Foulborn Lori's Lantern attack speed mod works as intended as sheet aps changes when I unequip in hideout.