[GAMEPLAY] Point and click projectile bug?

So im not really sure what they call those kind of skills, but basically skills like Akali Q or Shaco E. Skills like these gets cancelled when the enemy you cast it on moves into the fog of war.

For example you cast the skill and animation goes off. Right when the skill is about to hit and you lose vision of the enemy into the fog of war, the skill cancels entirely and it goes on cd for a split second.

Im not sure if the same "rules" applies to brushes, but the bug appears everytime the situation im describing above is happening.