Transform position/scale precision problem

I'm sorry, I'm not quite sure what the problem is, or what keywords should I search for answer.
I have tried many keywords but got nothing.So I post this thread.
When changing gameObject in Hierarchy, The position/scale will automatically change by a small number like 0.00001 or 0.00002.


Here is the structure.Target GameObject's scale changed when I move it to another place.
The parent object has a (0, 90, 0) rotation.
The more steps the more offset.
I wonder if it will cause many other potential problem such as walls' z-fight, or different scale prevent batching?
Any


Any advice would be appreciated.Thanks!

 

you've already already probably figured it out, the problem is that floating points (float variables) by definition work with a margin of error to preserve efficiency. double variables actually do the job and are precise