Firestorm is missing projectiles

At the beginning of a firestorm cast, one projectile falls and explodes on the ground. After that, for a period of around 0.5 seconds, the skill produces the animation of fire falling from the sky, but does not explode on the ground and deals no damage during said time. After the 0.5 second interval of no damage, the skill works again as intended.

This issue isn't a big deal with the long base duration, but when used with "Wildsurge Incantation" notable (which decreases "Storm" skills' duration by 75%) the 0.5 seconds of no damage is very noticeable and takes up over a quarter up the total skill duration.

Note that this interval of 0.5 seconds of no damage and no explosions on the ground appears to be static across both long and short skill durations.