So, I thought this was a nerf to Spellthief's Edge in general, but apparently it's a bug with Lux.

Lulu passive and Sona passive, as combined with auto-attacks, both proc the Spellthief's Edge an additional time. But this doesn't happen with Lux's passive. I do hope this wasn't a champion-specific nerf of which I am yet again ignorant. And while we're at it can we make Lux support official? (If, for example, the person is queued as support and takes Exhaust on Lux, they're scored as support?) There's already a jungle/non-jungle scoring comparison, so why not have multiple roles implemented on other champions in similar fashion?

And no, that 1-in-10,000,000 Lux traded to mid who decides to take Exhaust should NOT be counted as more important than the rather common Lux supports.