The intricacies of game mechanics

I stumbled upon this recently. According to the hero help and PhysMig, a creature under the Hypnosis spell should not retaliate against attacks from the player who cast the hypnosis. I checked SoD and HotA, and at all levels of Air Magic, it always retaliates. However, everything else works as described in PhysMig (you cannot open Castle gates and it does not block enemy shooters).