should-have-complete-templates false positive on a well-formed template (page-sidebar.html)

[markrusselldev]

Reporting this for the feedback requested in the informational Trac comments.

On my theme's review (Trac #284094, theme Blockwright), the tool reported:

There's a problem with templates in: /templates/page-sidebar.html
See: ui-errors.md#should-have-complete-templates

The docs say this check verifies that all tags have closing tags and are properly formed. This template looks well-formed: every block comment and HTML tag is balanced, and the sidebar template part it references is balanced too. Automated Theme Check on the same upload passed with 0 required issues. So I believe it is a false positive, but tell me if I am missing something.

The flagged template (templates/page-sidebar.html):

<!-- wp:template-part {"slug":"header","area":"header","tagName":"header"} /-->

<!-- wp:group {"tagName":"main","align":"full","layout":{"type":"constrained"},"metadata":{"name":"Main"}} -->
<main class="wp-block-group alignfull">
  <!-- wp:columns {"align":"wide","style":{"spacing":{"blockGap":{"left":"var:preset|spacing|x-large"}}}} -->
  <div class="wp-block-columns alignwide">
    <!-- wp:column {"width":"66.66%"} -->
    <div class="wp-block-column" style="flex-basis:66.66%">
      <!-- wp:group {"layout":{"type":"constrained"}} -->
      <div class="wp-block-group">
        <!-- wp:post-title /-->
        <!-- wp:post-content /-->
      </div>
      <!-- /wp:group -->
    </div>
    <!-- /wp:column -->
    <!-- wp:column {"width":"33.33%"} -->
    <div class="wp-block-column" style="flex-basis:33.33%">
      <!-- wp:template-part {"slug":"sidebar","tagName":"aside"} /-->
    </div>
    <!-- /wp:column -->
  </div>
  <!-- /wp:columns -->
</main>
<!-- /wp:group -->

<!-- wp:template-part {"slug":"footer","area":"footer","tagName":"footer"} /-->

I can share the full theme or the sidebar part if that helps.