Mindslaver does not work with AI (probably also not with human opponent)

[LevelX2]

AI casts spells and select attackers the turn I should make all decisions because of activated Mindslaver.
I can't activate abilities of permanents of the opponent during the controlled turn.
The triggered ability that end Mindslavers effect has not the mindslaver picture on the stack. Shouldn't be a triggered ability or visible at all..

[LevelX2]

Human vs. Human seems to work correctly (told me players that used the spell in FFA macth).