As I already posted in your other thread, that is because you need to put the camera too far from the origin (due to the high scaled scene) and at this scale the auto-grid feature becomes a problem.
So, it's "mandatory" to hide the Ground Plane before you start to work on a scene big like this.
It's a problem that may need some attention to be fixed/workarounded.
So, it's "mandatory" to hide the Ground Plane before you start to work on a scene big like this.
It's a problem that may need some attention to be fixed/workarounded.