Guild Wars 2

The Protector’s Impact trait (Guardian’s fall damage reduction trait) will only reduce the damage from one fall every 8 seconds. Any further falls during the 8-second window when the trait/skill is on cooldown are taken at full damage.

Initially, I thought that this was because both the trait and the associated skill had an ICD, unlike most falling damage traits (which have no ICD on the trait, but do on the associated skills the trait casts). However, Revenant’s Planar Protection appears the same way (both the trait and the skill cast by it have an ICD of 5 seconds) but multiple falls in that 5-second window all have their damage appropriately reduced. Furthermore, Necromancer’s Terrifying Descent has an ICD of 30 seconds without any secondary skill cast at all, and it likewise reduces the damage from all falls.

Conclusion: Protector’s Impact is just uniquely broken.