Board Thread:Bug Reports/@comment-25565811-20161215233736/@comment-25565811-20161216215647

''Campinator wrote: ... if some improvement inadvertently changed the spawn check ...''

The Rhudaur Castle was added in to those biomes. Perhaps Mevans used an un-fixed pre-28 version for this and accidentally reintroduced the bug that way. Sometimes, stuff like this happens.