As per title, the ldJsonHtml was attempting to set duplicate alernativeHeadline if a Meta Title did not exist. This was a simple cut and paste issue on my part that has been FIXED via a simple template edit that never got included in the last release.
This has been resolved in SC 3.2.18 as this template edit has been included with the release build.
This has been resolved in SC 3.2.18 as this template edit has been included with the release build.