Board Thread:Bug Reports/@comment-25841881-20160730200924/@comment-27219153-20160731000853

For farmhands, it doesn't always happen when leaving and reentering chunks but that is the only time I have ever noticed it happening. As far as I can tell, its fine when all the chunks are unloaded and loaded simultaneously such as fast travel, but leaving and returning to my base on horseback or walking is when the duplicating and/or disappearing occurs.

For the hired Gundabad Orcs I mentioned, it happened while the player was traveling. The orcs were teleporting to keep up with the player and after one of the teleports, there were 8 orcs instead of 4.