[Gameplay] Ryze Spell Flux spreads with Overload

Don't know if this is a bug or if it is intended, but haven't seen anything about Ryze in the patch notes. When a target have Spell Flux (E), and he hits it with Overload (Q), Spell Flux spread towards nearby enemies even though the first target didn't die (the first target spell flux is consumed). This happens on champions, minions, and jungle monsters.

A step-by-step: 1: Hit an enemy, surrounded by other enemies, with Spell Flux. 2: Hit it with Overload, without the enemy dying. 3: See how Spell Flux spreads to the other enemies

Have happened in 2 games (out of 2), and 2 solo-custom games.