I'm pretty Sure Fork doesn't work with Eye of Witner

Okay, first of all, there is a tooltip that says modifiers to number of projectiles only affect the final spiral. I don't think it's completely clear that fork is a modifier on the number of projectiles, as it is more of an effect that happens on hit. But even if that's the intended behavior, the needles from the spiral don't seem to fork either.

I got the deceleration support gem and got the slow projectile passives just to make sure it isn't a case of me not seeing the projectiles correctly. I also tested pierce, which clearly works. And I tested Fork with Fireball, and it's prety clear that it works.