If I leave the quest area will enemies respawn?

When I am in a quest sometime I go searching for some healing plants, or I hide from some robots (not far away I am still near the quest area).

I noticed when I get back to the original area, the robots that I have killed have re-spawned - it's like I am repeating the mission again.

Why is it that if I leave the quest area for a minute, the robots/humans that I have killed re-spawn? Is this normal?

Solution 1:

It seems like it depends on the quest. In most cases, they seem to never respawn, but in at least one quest that I encountered (find out more about the mysterious woman at the site where Olin mentioned), they respawn, like you said, even just being a building away. It is very frustrating, to the point that it did seem like perhaps bug.