Board Thread:LotR Mod Technical Support/@comment-2604:6000:D2C5:7800:5567:8D25:4BBE:B402-20190904133646/@comment-25612015-20190904193426

I've no idea about how to prevent this from happening, but for fixing you can use Region Scanner. Peculiarly, it will be able to delete chunks, get rid of any excessive mob concentration, and report on unusual height differences at chunk borders.