Issue Description:

Mobs not spawning in loaded chunks unless player is present

What happens:

No mob spawns unless player is present

What you expected to happen:

Mobs to spawn when I leave the area and have the area chunkloaded

Steps to reproduce:

1. make mob spawner with chunkloader
2. leave area
3. observe no mob spawns
   ...

Affected Versions (Do not use "latest"):

• Soul Shards: 1.10.2-2.6.7-48
• Minecraft: 1.10.2
• Forge: 12.18.3.2316