Big NURBS bug

[PeterSwift]

If you select Render as NURBS, or in my case I select on some specific part to "render as NURBS"    I do that. looks good. Save and close the program. If I reopen then those parts have now slightly moved.
If I uncheck "render as NURBS" on those parts, save and reopen it's back where they should be.


Up to date Keyshot 7
MacOS up to date.