Board Thread:Bug Reports/@comment-27516710-20160901195709/@comment-29777393-20160927181533

One thing I have noticed is that when on a server, the number of mobs spawned is directly affected by the number of players within the given chunk or the chunks around it. I have a server that has two people playing on it most of the time. I will go to an area and very few mobs will spawn while I walk around. My wife then fast travels to the area with me (after I have been there for a bit) and mobs immediately start spawning at an alarming rate. As soon as one of us leaves, the mobs immediately start despawning such that within 4 or 5 minutes, they are back to their sparse numbers. I have seen it such that in Lothlorien I had 3 elves around me in a 64 block radius. My wife came and as she walked from the FT point to where I was, elves started popping up along her path. Within 5 minutes of reaching me, the 64 block radius was literally packed with elves similar to your images Obisidian. My wife then FT away and within 5 minutes, there were only 3 elves in a 64block radius again. We tried this in reverse to see if it was her (she goes there, I FT in then FT out after 5-10 minute) but the results were the same.

I am also noticing it appears to affect different races to a different degree. For example, we noted the same behavior as above in the Blue Mountains in a dwarf mine but the behavior was much more subdued in the Iron Hills in a dwarf mine where the numbers seemed not to be as affected by both of us being there at the same time.