Guild Wars 2

Thought this earth trait would be handy when switching attunements, but it doesnt seem to work? i dont see any extra stacks or buffs on other characters, is this bugged?

It perfectly works, you get 3s protection everytime you use an aura : 1) shocking aura, 2) frost armour, 3) fire shield , 4) magnetic aura.

Note that Arcane traitline can increase uptime of protection