I learned the other day that caves are very dangerous in SoD.
I was going through the trogg cave in Loch Modan for (In defense of the kings lands) quest and I killed most of them. When I turned around to head back, I was met with a layer change and got mobbed by several different groups. Same happened in Redridge when I was doing Champions (BR Orcs), but never even reached the cave. Not sure if it was just a hyperspawn area or kept changing layers on me, lol.
This happen to you?