Model Lightning Bug

[Koltira]

Whenever i select this harpy model (a copy of a harpy model with a different skin, i edited the .mdl and just changed paths) the whole map's models become unlit

here's when i select it: Gyazo - 143633ee0e5024e781c21fd72664cdba.jpg
and here's normal: Gyazo - 71752608a10d7a91d17aecaad47d6a01.jpg
here's when the area is not revealed: Gyazo - d6a257cc47af74a09a86c67a323934a6.jpg