incomplete chunk generation when using internal server to generate lods and chunks

after doing an internal-server pregen for my server and checking the bluemap for the server, there's a significant ammount of holes in the maps. the chunks exist, but by doing a bluemap debug it says that it's missing light data. this is interesting as internal server is 'sposed to call the normal gen so light data should be there, but it ends up incomplete. i'd have to use chunky or exploring normally for the chunks to appear right on bluemap.