Board Thread:LotR Mod Technical Support/@comment-30553864-20161116231332/@comment-27219153-20161117004444

If you would like I can remove the spawner like I did before.

However, since this is a recurring issue, it makes me think there is some sort of underlying problem, either with your world or your graphics drivers. I'd be interested to know what happens when you create a new world (cheats enabled) and spawn in a spawner.