Collectible Card Game Headquarters

Describe the Bug:
Megrim's triggered ability doesn't trigger when its controller's opponent discards a card.

Which card did behave improperly ?
Megrim

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
CoRM15 mini3, duel

What exactly should be the correct behavior/interaction ?
Megrim's triggered ability triggers when its controller's opponent discards a card.

Are any other cards possibly affected by this bug ?
Also tested Liliana's Caress -> no bug

Confirmed.

Worth noting that it was working prior to M15 at least. I brewed up some black discard decks that used Megrim and Liliana's Caress and both cards worked fine in previous patches.

Fixed in 477429e