another flipped normals problem

Despite normals are shown faced outside correctly in 3D view, sometimes specific normals are exported flip. This nuisance occurs in some objects.

The problem could be fix if you try this.
1. Select the object in 3D view.
2. Object > Clear/Apply > Apply Scale/Rotation to ObData (in Object Mode).
3. With Ctrl + N, fix normals again.

These kind of situations are happen when I rotate, scale, transform an object a lot.