Guild Wars 2

Basically my 2 sets are Dagger/Dagger and Dagger/Dagger
And i have a short bow in my bag for out of combat movement between points.
Now on 1 dagger for each set has energy sigil on it.
But it just stops working sometimes

EDIT : RE-LOG DOES NOT ALWAYS WORK

nobody else getting this? that is the 50% energy gain just stops working