Warrior class skill counter-attack seems to be bugged

[blamzooie]

For some odd reason it doesn't seem to trigger in half my turns. I have a stack of Trolls that I push forward every battle to soak up damage, and my counter-attack skills is L3. I find that half the turns, counter-attacks past the first don't trigger. When I mouseover the defence stat, the russian text for how many counters you have left isn't present on some turns, and those are the turns that the troll doesn't CA beyond the first. Is this a known bug? I searched the forums but couldn't find anything.