[GAMEPLAY] Lux passive does not trigger Spellthief's Edge

As we all know, whenever Lux lands an ability, her passive applies a mark to the enemy. When a Lux with any variation of uses her auto-attack or ultimate to proc the passive's damage, it does not apply the Spellthief's passive an additional time. (Meaning an auto-attack + passive would yield 8/15 gold rather than 16/30). This does not occur with Lulu's passive or Sona's passive.

To reproduce the bug:

1. Land an ability on a champion as Lux with a Spellthief's Edge.
2. Auto-attack a champion with the passive effect on them.

To compare:

1. Auto-attack a champion as Lulu with a Spellthief's Edge.

Or:

1. Build up three stacks of Sona's passive.
2. Attack an enemy champion with the passive-enhanced auto-attack.

This bug has set me slightly behind in gold against both Lulu and Sona players several times now, and while I don't have video, it's incredibly consistent and easy to reproduce. I'd love to see this fixed ASAP.