Heck I hope not! Cause this is how I'm playing my solo ranger.
I don't like turn based combat, so this is how I avoid it. Whenever I see red dots on the map, I instantly enter sneak mode, creep up on the enemies and take them out with my bow before they ever see me.
It's wonderful! And if I'm careful to never trigger a 'Fight' then I don't have to deal with turn based combat.
So I hope it's not a bug. But if it is, then it's an awesome one and I hope they leave it alone!