Operating system: Windows 7
Graphics card: gtx 1070

Blender Version
2.79b

Hello!

There is a problem in blender.

Sometimes if you rotate an object, and set apply "rotation and scale" , the dimensions of object will be changed strangely.

I made a gif, that will help understanding the problem.
This is a huge problem in blender long time ago, in results, the working make extremly slow, and full impossible to make precision works. This is a thing which is needed to be repair. In architecture, precision is mandatory.

Also, i attached the blend file.

I hope somebody can help.

Thank you!