Spectral Volley disappears after weapon swap

Spectral Volley disappears after weapon swap, which is very disappointing and makes it pretty much useless from what i can tell.
Waiting 3 seconds for them to fire negates the whole point,
cause you can do more dps in those 3 seconds instead of using this support and waiting for them to fire.
With weapon swap it would've made sense and was what i intuitively picked it up to try with.