Unity 5.3.5f1 Platform Android, Texture compression ETC, object (4526 tris) using 3 (standart) materials
Check all of the lights settings. Maybe you forgot to switch to baked or mixed mode?
Baked or mixed always the same result
Does all meshes marked as static? Is this using Standard material?
yes as static
1 Standard - opaque ( emission )
2 Standart - cutout
3 Standart - opaque
Strange. Not sure if you check the precomputed realtime GI may help.
If not. Would you mind to upload an Unity package? I try to check for you.