I have upgreaded my spigot to 1.8.6 and mooshroom spawners wont work and wont spawn mooshroom. Then i upgraded my spigot to 1.8.7 and i still have this problem. Before i was using spigot 1.8.3, i dont have this problem. No plugin cause this problem because i have try removing all my plugins. It is a spigot bug. Do someone know how to fix this?