Dynamic Batching not working on seperate objects

I’ve got the meshes which are under 100 verts and have them alot placing in the scene. For some reasons, when I put some of the objects as a child of other objects, the dynamic batching seems to get started breaking. Is that the bug of Unity 3.3?

Dynamic batching requires them to be uniformly scaled, potentially the objects you put them under + their own scale makes them non uniform which kills the dynamic batching