Collectible Card Game Headquarters

Describe the Bug:
Mass Polymorph when casted with alot of creatures on your board it just exiles them without giving you any creatures. it even shows only so many cards. see savegame

Which card did behave improperly ?
Mass Polymorph

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Journey into Nyx v1, Duel

What exactly should be the correct behavior/interaction ?
supposed to exile all creatures you control. then reveal cards from top of library until you reveal that many creature cards. Put them onto the battlefield and shuffle the rest of the revealed cards into your library.
Are any other cards possibly affected by this bug ?

Seems like it works fine up until you Mass Polymorph more creatures than there are remaining in your library. At which point it reveals all the cards but puts none of them into play. Confirmed.

Fixed in f1f4403