] I wanted to try out to export some Blender chess Models, to create a little chess game with Unity. With 2 of the Models, everything worked out fine, but the third is behaving weirdly. It seems like the model is always tilting, so that you see it from the same side all the time. Problem is, i made the models a few months ago, so I don't know exactly what I might have done differently in the third one. But as far as I remember, I made all of them the same way. I hope the 2 Images clarify what I mean/what my problem is (I only used the Hand Tool to show the different perspectives.
I'm working with Blender version 2.79 and Unity 2017.3.0f3 (Personal). I exported all the models as .fbx file (only the mesh).