Frostbolt not working with Fork and Gambleshot gems with Snakepit ring

Frostbolt not working with Fork and Gambleshot (no addition fork iteration) gems (and seems so with Projectile Acceleration III - no dmg added, only speed) with Snakepit ring (left slot).

Snakepit
Pearl Ring

Left ring slot: Projectiles from Spells cannot Chain
Left ring slot: Projectiles from Spells Fork
Projectiles from Spells cannot Pierce