The skill node for spriggan form Spiritwhisperer states that the vale spirits will cast spirit thorns automatically as they orbit around you. They absolutely do nothing, unless you manually cast spirit thorns. In that instance, they will cast spirit thorns. Though it seems to be one or two projectiles at most if they even function at all. This seems pretty counter-intuitive from the way the tooltip reads, being that it says automatically.
I have relogged, and re-entered spriggan form to see if this behavior gets fixed.
I have found bug posts back from 2019 where this issue has been reported multiple times. If this is intended, can we please get a tool tip clarification?