Collectible Card Game Headquarters

Describe the Bug:
When given lethal damage, Dimir House Guard can sacrifice itself to itself and successfully regenerate to stay on the battlefield somehow.

Both the player and the AI can do this.

Which card did behave improperly ?
Dimir House Guard

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
OoAv2

What exactly should be the correct behavior/interaction ?
If it sacrifices itself, it is no longer on the battle field.

Are any other cards possibly affected by this bug ?
NA

Well, fixed as f27a9e, but it seems the AI it's still smarter than me and keeps finding workaroud behind my safeguards