Drawings deform when doing 3D rotation

I’m having some problems when doing a 3D model (such as buildings or houses) on Animate Pro 3. The drawings that are affected on a 3D rotation are skewed every time, but only on the perspective view. In the top or side view they look completely normal. How do I fix that? Or is it normal?

Here’s an image

To me it seems entirely normal. You are looking at a drawing in perspective, by definition it has to be skewed.

Can you post a picture?