I understand that the issue where healing relics can trigger to heal a target that has been killed, has been fixed.
However, I just experienced a Ruby heal itself after being killed. Note however that it was not a clean ohk: the attack left Ruby with around 2k life and my attacker's Jakugan Sword supplied the extra 10k damage that finished it. Then it healed and survived.
So it may be that the fix just didn't take damage from Relics into account.