I can easily reproduce at least issue I have, check out the Affinity Designer’s Handle Bar and the Handle Bar Points.
At least I know what to look out for now, I rebuilt a plane model 3 times, finally realized it at the last attempt where the issue was.
Affinity Designer
Curve handle points looks the same but does something different in Shapr
Affinity Designer (PDF) to Inkscape (DXF) to Shapr is correct
Rhino Same as Affinity Designer didn’t need conversion.
LibreCad can’t open Affinity Designer DXF.
