Hello! I've posted a bug report similiar to this one.
Our server crashes when we load in a certain area. North from these coordinations : 754 69 1271. The server console says ; Can't find the chunk. After that it crashes. Here is a bug report, our world and also our seed.
https://www.dropbox.com/s/in9p0rf5c3rmrvm/world.rar?dl=0 <-- our world
108325537175594 <-- seed

Note : I did clear the cache once.