Unfortunately, most of these kinds of decisions are based on $$$ instead of the things you note.

You're going to hate the answer but here it is.... After you scale it up and are certain you've made a good clean surface, you scale it back down and stop worrying about how it looks...the math behind the surface is correct. It will cut properly. That chord tolerance is simply how it is visualized.

Try bringing in a full model with a Chord height set that tightly

.003" yes, definitely a size issue....scale it up 50 times...make your surface, then scale it back down to make a Coons, the selection order

How small is that? It looks like it's possible it's extremely small... and what tool did you use?

Coons Alt + C Pick 2 lines(2 sides) and a line and an intersection point(top line & opposite intersection point)

And still no testable file

Bad choice for that function

Let's recount... You have, by your own admission, your first programming job... You say it's 100% a bug and you provide an .ecam file that the vast majority of people cannot open.. I suspect it's not a bug but a usage & definition, setting issue of course though, can't tell because you provided a file that industrial users can't open. Maybe next time before declaring a bug or something, you provide a file that others can easily open and query...that would go a long way to getting you the help you are asking for,,,, Sorry if this all comes off as a bit harsh but at least help us help you.

Sure... Pickup phone, call reseller...hello, I would like to buy a post with these options and I'll send some sample code... That edit is no easy lift.

Why not? It sounds like they stole the money, got into the car turned the key and drove the getaway car..

Wait....you mean Mastercam ISN'T malware?????

Sounds like a graphics card or driver issue

https://www.kurtworkholding.com/resources/cad-drawings/

Yes