Object Space Normal Map - Object Clones break Normals

I wrote a shader that does lighting in Object Space. The problem is if I clone the object with same material the lighting gets broken (wrong lighting angle and lighting looks baked), if I clone the material and use that for the clone object I loose batching.

So unless this is an expected behaviour for objects using O-S Normal Maps, this is buggy. It's like correct lighing gets rotated by some degree and gets baked like a texture, as soon as I delete the clone lighting returns to correct and expected behaviour.

As a simple test if I set Directional Light Rotation to (0,45,0) to gets same lighting when cloning the object i need to rotate Light to (45,90,0). But this doesn't solve the problem where the lighting getting baked to the object.

In vertex function I calculate these:

 float3 OS_LightDir = normalize(ObjSpaceLightDir(i.vertex));
 float3 OS_ViewDir = normalize(ObjSpaceViewDir(i.vertex));
 float3 OS_HalfDir = normalize(OS_LightDir + OS_ViewDir);

In fragment normal direction is read directly from the texture and doesn't need any conversion except for being in range [-1,1]. This is the code:

 float3 normalDirection = normalize(2 * tex2D(_BumpMap, o.tex.xy) - 1.0);

Can this be solved, or OS-Normal map is good only for single objects or no batching with multiple materials ?