Hello
I have my survival since version 1.4.7 and over the years I have been changing version without problems , but this time , from the version 1.8.x ( any of them) to version 1.9.x or snapshots, encounter the same problem , I always disappears the same villager , move where you move and put it where you put . I thought I could maybe be one of his DataValue and added a nametag, but the problem persists . It could be a bug on a large scale or only some particular reason?

Link of the world: https://drive.google.com/file/d/0B74JGSlzacvUd0JUQS1FTE1zZVk/view?usp=sharing

Coords:
x:-110
y:65
z:410