Fusion rendering and exporting inaccurately

[autodesk_comSHNVM]

I have a chopped cone with a spiral inside it.  The spiral has a cross section 3mm tall x 1mm wide

When I zoom in and out the the rectangle seems to shear sideways.  

Further when I export it to stl and give it to a slicer the slicer also instead of printing a 3x1 cross section in layers waving back and forth causing 3d printing artifacts.  

Is this a bug, is there a known fix?

[asiudaisd]

stl is inaccurate, try exporting as step or right clicking component -> Save as mesh -> 3mf.
Also add the f3d file so I can take a look at it.