Board Thread:LotR Mod Technical Support/@comment-2A02:1811:B11D:4300:C454:50FA:C140:A22B-20190914131503/@comment-25612015-20190922050556

Apparently this is an unresolved Minecraft bug in 1.7.10 (and later versions!): see MC-4061 for a start, then all related tickets.

However, as it happens here with LOTR named NPCs, perhaps it would be interesting to do something in the mod to detect / control the issue. It would have been funny if that Amlaith guy had been a quest giver :-)