Guild Wars 2

Im a elementalist and when i use dagger water att 1 skill vapor blade on other players around the pve world it shows immune on my screen.

This hapends only when the vapor blade turns back towards me.

So if i shoot it towards the player nothing happends, but when the vapor returns back and hits the player again it shows immune on my screen

Anyone knows whats this all about? Is open world pvp confirmed? :P

This is like since launch. The skill basically try to apply chill on an ally. Probably some old implementation left over.