Gutter Mitered 20 Missing Corner in Elevation View

[Anonymous]

I must be missing something but I can't figure out why I have no drawn edge for gutter mitered 20 when I'm in elevation view. I'm been through the objects settings but I can't see anything obvious!

[Anonymous]

I've just tried a new project and it is fine, there must be an issue with the gutter in my other project file.

It is still a problem, with Gutter Mitered 20 with the Custom U style.