Wall End turn skin lines

[Anonymous]

I am having trouble getting skin lines to turn using the wall end tool.

In the attached image, you can see how the core (grey) area of the wall does not have a red end line.

I think I have tried all of the possible toggles in the element settings for the wall end, and I have end lines set to "on" for the wall itself.

I am also showing the composite settings for the wall, since I know that can be a problem.

Does anybody have an idea what I might be doing wrong?