CATIA / Part Design/ Result of edges

Hello everybody

During the work in the App (CATIA/3DExperience), the question came up about a behavior when working with, for example, the Feature and the functions. "Strange" edges appear in the result. We were wondering how and why the result looks like this? Generally, it's not a big problem but does anyone have similar experiences or maybe an idea or why the behavior is like that?

I have a small example here that shows the behavior:
 


Kind regards
Raffael Gwosdek