Shock Blasts Disappearing [GAMEPLAY]

When playing Debonair Jayce on Howling Abyss, about 1 in 3 shock blasts will travel until they hit something/reach maximum range as normal, but instead of exploding, will simply disappear and do no damage. I'm not sure what makes a shock blast disappear, since both accelerated and normal ones do so. Obviously, this makes Jayce pretty hard to play on ARAM, so it'd be awesome if this could be looked at.