Axe's symbol lasting 2-3 seconds

I don't see any topic regarding Axe's symbol. Mine is lasting around 2-3 seconds only, while other symbols last 4-5 seconds.

Is this a bug? Tooltip states 5x hits, but all those hits in 2s? I remember a bug from last month fixing the symbol's damage, but the duration still seems wrong.

Most symbols pulse per second, but there are ones like Punishment which are on half second tick rates. I'm not on to test is, but I speculate it operates like the Melee symbols; with the impact being the first pulse, and the remaining pulses based on the symbols life span. Thats why half the guardian symbols do 2 ticks of damage on creation.