Chief Architect X17 - Plot Lines omitting outside wall corner in Interior Wall Elevation

[BBilling]

Has anyone seen Plot Lines omit the outside corner line of a short (12") shower return wall in an Interior Wall Elevation?

• New X17 plan with standard interior walls.
• Live View shows the vertical line.
• Sending to Layout as Plot Lines omits the line.
• If I disconnect either wall at the intersection, regenerate, and resend to Layout, the missing corner line appears.
• Reconnecting the walls causes the line to disappear again.

Is there a setting I'm missing, or is this a known X17 vector/Plot Lines issue?