Dynamic Batching Strange Scale Behaviour

I have made some tests with Dynamic batching and have seen some strange behaviour.

As i know to dynamic batch to work i need uniform scaling which means x = y = z in all objects to be bathed.(i know there are other things too but my question is jsut about scaling)

The objects i will talk about fullfills all the requirement for batching. Im sure about that. I have put some objects on scene which has 1,1,1 scaling.(Not primitive) When i set their scale to (1,1,1) they dont batch but strangely when i set their scale to (1,1,0.99) they start batching.

Well as i understood from Unity documents it should be contrary ? or am i missing something ?

Thanks for any answers.That troubles my mind quite a bit.