After killing a big Krug one of the small ones appeared behind a wall. It came to fight, went back behine the wall and later disappeared. It happened for the first time, not a bid issue anyway. See the video. 00:07 - 00:25 VIDEO
When either of the krugs split (big into medium or medium into small) they have a time before they de-spawn as to allow for the next krugs to spawn in (looks like 15 secs) i've run into this after time at which i kill the original medium sized krug, then splitting the large one and having to run off to counter gank.
Essentially splitting both originally present krugs counts as finishing the camp and leaving it for 15 secs results in them despawning.
