Technical Specs (please complete the following information):

• Craft to Exile Version 2.8.6b
• World Type multiplayer
• RAM Allocation 10GB

Describe the bug
When encountering spawners in dungeons/other generated structures, lighting the room does not prevent mobs from spawning. I noticed this with behemoths from Lycanites Mobs but it also happens with other mob spawners.

To Reproduce

1. Find a mob spawner
2. Light everywhere around it and on it
3. Mob still spawns

Expected behavior
I would expect the mobs not to spawn however I am not sure if this is an intended feature, as I searched a while and didn't found any mention of it.

Not sure why this is happening, but spawners are at least destructible again in 2.8.7!