[Is this normal? Top layers]

So, I went and tried all the recommended values which are 0.12, 0.16, 0.2 and 0.28 mm and it might help a bit with the higher quality ones but the top layers always seem to be missing, so I went and tried the limits which are 0.04 and 0.32 mm and I still get the issue.

 

I'm not sure if it's the curvature of the model because even if the model has the same curvature in a lower layer it works, the issue only seems to affect the top layers.

[Is this normal? Top layers]

Hello, I'm trying to make my first file with Cura and I wonder if it's normal that the top layers look like they are missing something.

 

I tried changing the Show 5 Detailed Layers option but it still looks weird, made a sphere as an example, here's the images: