OK, here it is, for the past couple Snapshots, including the current one, whenever I run this Snapshot on my favorite world, which was created in 1.8, and is currently being ran in 1.12.2, but won't work in 18w09a+, it leads to some bugs that I think might be inter-connected. Firstly, whenever I leave an area, and come back, all the mobs are frozen and don't make noise. Second, when I leave and come back, all the redstone stops working. Literally, I can't even open a iron door with a pressure plate. Third, when I leave and come back, at the same time as the other two, all the fences loose the beams connecting them and become plain old, free standing fences posts. All these things happen the moment I leave and come back to an area. So, what do I do? Hope this helps. Rockatoa, Brickticks out!