Passive skill Light armor mastery no work?

[Shakta 0]

Hello, i'm a summoner and my skill light amor mastery not work, when i change my set robe for light my atk speed is same, only change mine P def and cast. speed.

[Koll 1233]

Hello. Maybe because of this?

https://l2wiki.com/classic/Magician's_Movement_-_Human_Mystic

 

[Poseidon 452]

suddenly