NO mods on my system at all. For at least as long as betas last, I'll be playing only the "plain" game.
Only one Nabaja in my current game. My realm is still pretty small. But I do have another hero with dominate, and both are in the stack that did the fighting.
My guess is that it is a timing / out-of-order issue, like hughes said in reply #2.
FWIW, in my other issue (where I autoresolved and the enemy was still there and I could fight them over & over) -- that was in a different campaign, and I wasn't using dominate.