Last week, when Google added the breadcrumb report to the Google Search Console enhancements section, Google also sent out email notices to those with issues. The subject of the email read Fix Breadcrumbs markup for domain.com.
The email says "Google systems show that your site is affected by # instances of Breadcrumbs markup issues. This means that your Breadcrumbs pages might not appear as rich results in Google Search. Search Console has created a new report just for this rich result type. The new report enables you to identify, fix, and resubmit affected pages to Google so they can start appearing in Search Results with rich result features."
Here is a screen shot:
If you got this email, there are things you can fix around your breadcrumbs showing up in search.
John Mueller from Google said on Twitter "Since we launched the new report, we also now automate informing about issues for it :)."
Since we launched the new report, we also now automate informing about issues for it :).
— 🍌 John 🍌 (@JohnMu) September 20, 2019
Forum discussion at Twitter.