Snap freeze not applying itself

snap freeze doesnt hit (or completely hit) ennemy sometimes:
i took the frosbite and hit damage node and have witnessed thoses results :

  • Ennemy are getting frostbite and taking damages (expected results)
  • Ennemy are not getting frostbite nor damage, regardless of their position inside the area of the skill, even if their nearby collegues do (wich would suggest a dodge, but at level 20ish?)
  • Ennemy are not getting frostbite nor taking damage but are getting stack of chill from my gear (chill on hit)