[confirmed]AI never untaps Colossus of Sardia

Describe the Bug:
I played several games and AI never untapped Colossus of Sardia even if AI had nothing better to do with it's mana or even if it would win by doing so and then attack.This doesn't seem like normal AI behaviour so I believe it is bugged.
It works fine for human.
Which card did behave improperly?
Colossus of Sardia-AI
Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink 2016/08/27: Eldritch Moon v2, duel
What exactly should be the correct behavior/interaction?
AI can use the untap ability of Colossus of Sardia.
Are any other cards possibly affected by this bug?
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I played several games and AI never untapped Colossus of Sardia even if AI had nothing better to do with it's mana or even if it would win by doing so and then attack.This doesn't seem like normal AI behaviour so I believe it is bugged.
It works fine for human.
Which card did behave improperly?
Colossus of Sardia-AI
Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink 2016/08/27: Eldritch Moon v2, duel
What exactly should be the correct behavior/interaction?
AI can use the untap ability of Colossus of Sardia.
Are any other cards possibly affected by this bug?
-