[GAMEPLAY] Malzahar Malefic Visions doesn't spread through Karthus

Malzahars Malefic Visions (E) won't jump to another target when killing Karthus even if an enemy is in range. I tried it numerous times and never did it spread to another enemy even though all the needed conditions were met, that is, an enemy was in range and the DoT was on Karthus when he died.