Collectible Card Game Headquarters

Describe the Bug:
1) When Grenzo, Dungeon Warden's activated ability resolves, the top card of its controller's library is put into that player's graveyard.

2) If that card is a creature card with power less than or equal to Grenzo's power, it is not put onto the battlefield.

Which card did behave improperly ?
Grenzo, Dungeon Warden

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
KOT, gauntlet

What exactly should be the correct behavior/interaction ?
When Grenzo, Dungeon Warden's activated ability resolves, the bottom card of its controller's library is put into that player's graveyard.

If that card is a creature card with power less than or equal to Grenzo's power, it is put onto the battlefield.

Are any other cards possibly affected by this bug ?
-

All fixed in 3194816

This was closed, but Grenzo still doesn't work properly:

Creatures with power equal to Grenzo's remain in the graveyard when they're put there by Grenzo's ability. Creatures with power less than Grenzo's are returned as intended, though.

Fixed in 576934f