Print display in layout draws square ends on curves

When turning on “print display” in the layout mode, the lines appear squared. It doesn’t make a difference if they are joined or not. When the page is printed/exported as a PDF, the lines appear rounded like they should. I guess it is some kind of display issue?

I’m asking for a friend in class. I don’t know if it makes a difference that she uses Mac.
I have never had this issue myself on a Windows.

Hej Jakob -

I see this here on macOS with Rhino 7. This appears to be fixed in the current Rhino 8 WIP, though.