I have a part like this:

Where the 4 holes have cosmetic threads. When I'm doing my drawing, I notice some strange lines when set cosmetic thread to high quality:

They look very strange.

So my question is:

Is it normal way to represent threads? I don't think so though.

How to hide these strange lines without hide the entire threads? Since I want to still keep the thread(s) representation on the cut face of section view.