Object position affect static/dynamic batch in Unity5?

There are 2 cubes with same diffuse material and 1 cylinder with other diffuse material in a scene.

No light,no lightmap,all objects checked static,they are not transparent or cutoff material,they have union scale.

They should saved 1 drawcall because of static/dynamic batch,it is true in Unity4.

In Unity5,they also saved 1 "batch", but when I change a cube's position,the batch is breaked,and saved by batching become 0,Whether it is static batch or dynamic batch.

Here are the images:

when the cube at this position,batches is 3:

when the cube at front,batches is 4:

This won't happen in Unity4.

Is it normal or I missed something?