Top of rounded print not smooth - Cura 5.6.0

[odog 1]

I am new to 3D printing and do not understand all settings in Cura. When I slice a curved part (STLs and Cura Project included), Cura slices the part with a jaged top 10-20 layers (screenshot included) when in the model it is smooth. Is there anything I can do about that?

Cone_Hyperbola.3mf Cone_Hyperbola.STL

[Slashee_the_Cow 437]

I think the problem might be that the model gets too thin at the top for walls to generate properly. Here's what I get with Quality > Line Width set to 0.1 (n.b. you'll never be able to pull that off on a 0.4mm nozzle, I'm just doing it as an example) and Experimental > Slicing Tolerance set to Inclusive:

Still glitchy, but not quite as bad. You might have to try editing the model so that it never gets thinner than your minimum line width.