There are a few bugs.
Healer’s Retribution only trigger when the mantra is prepared and doesn’t work when a charge (ammo) is used.
Protector’s Impact and Liberator’s Vow are the oposite (only work on charges, not when preparing).
Smiter’s Boon is the only one – not bugged – that triggers on either one (preparing or using a charge).
Sorry for my english.