Originally posted by Pat Fenis:

Wouldn't despawn, it would lose aggro but still be there if the area activates again. If base structures or players are in it's line of sight it will start attacking them again.

So I wonder if that's what's going on. I myself have logged in twice now to our meadow base (on the edge of some black forest) to see a troll right outside the wall, hitting structures. I was the only one in the server when I logged in.

If someone logged out while the troll was around, he'd be right there when someone new logged in? We've excavated some anti-troll trenches around the perimeter, but there is some "day team" vs "night team" friction due to finger pointing around who is responsible for the great boar pen slaughter of March 22.