[Gameplay] Spellthief's Edge does not proc on Shaco's traps.

The title says it all, really. Shaco's boxes do not proc the Gold granting effect of Spellthief's Edge. To replicate:

1. Place a box near an enemy champion.
2. Have it attack that champion.

The item does still proc on his R, E and basic attacks.

Edit: The traps do not proc Spellthief's before minions spawn either (so it can't be killing a minions fault). The traps do not proc Spellthief's with Deathfire Touch or without any Masteries at all (so I doubt it's a mastery's fault).
Edit 2: What's the point of downvoting bug threads?