I would like to request that this be considered a bug, as it affects non-biter units as well. I had a couple hundred robotic attack drones (Bob's Warfare mod) disappear on me under similar circumstances, although they were mostly milling about open fields. Which actually is kinda weird, if it's an i...

At first I thought they were just despawning on a timer, as with the defender drones and such, until I realized they would only despawn after I was within roughly viewing distance. Watching them on radar, I've noticed that they stop moving after I've been gone a while, but will still rush in to atta...