Collectible Card Game Headquarters

Describe the Bug:
At the beginning of Creakwood Liege's controller's upkeep, a 1/1 black and green Worm creature token is put onto the battlefield under his/her control.

Which card did behave improperly ?
Creakwood Liege

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

What exactly should be the correct behavior/interaction ?
The token is optional.

Are any other cards possibly affected by this bug ?
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Fixed in 81e1c4e

Trigger is optional, but doesn't put a token into play when triggered.

Fixed in 18edee2