[fixed/clo]Hixus,Prison Warden trigger's dam to planeswalker

[Aswan jaguar]

Describe the Bug:
AI attacked with a wolf token and Etched Monstrosity assigned both of them to damage my planeswalker - Karn Liberated I cast then with flash Hixus, Prison Warden and blocked the token.Etched Monstrosity damaged the planeswalker and Hixus,Prison Warden 's ability triggered and exiled Etched Monstrosity although it damaged the planeswalker and not me.

Which card did behave improperly ?
Hixus, Prison Warden

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Manalink 2015/12/25: Battle For Zendikar,duel

What exactly should be the correct behavior/interaction ?
Hixus, Prison Warden ability trigger's only for combat damage made to you not planeswalker you control.

Are any other cards possibly affected by this bug ?
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[Korath]

Fixed 66eefe0.