Heh, thought the topic referred to her suicidal AI in the Moonrise Towers battle. Wild Shapes panther >> jumps into a throng of cultists >> dead before anyone gets to even take their turn...
Could be that the game somehow triggered the fighting if the player passed in the vicinity while stealthed, without putting them in combat. I've had that happen in a few encounters with AI controlled units - when trying to stealth my guys into good positions, enemy and allied AI were battling it out in real-time in the background even though I popped turn-based. Allied units were of course getting torn to bits, so I panicked and threw tactics to the wind and charged in to force everyone into turn-based combat.