Hey @vividground,
Crawling elements varies depending on the rules of the SEO tool and not the theme. It could be that the checkbot.io tool excludes headlines that are nested inside several layers of HTML elements. See the comparison of the HTML structure of the Classic Headline (simple) and the Headline element below (complex).
Please send that screenshot to checkbot.io support to verify what they support.
It is important to note though that checkbox.io does not represent Google nor any search engine. Cornerstone is used in thousands of websites including websites of SEO professionals. If Cornerstone causes Search Engine Crawling problems, we would have gotten many complaints.
If you believe in checkbox.io, you need to use the Classic elements because we cannot turn the V2 or non-classic elements’ structure like the Classic ones.
Thank you for understanding.