Why we need these reports?
It is fairly common for an error to pop up even after you run a new code through Google’s Structured Testing Tool. These new reports give you a comprehensive breakdown of when Google first discovered the error, the pages with the error and even what the error looks like.
However, while you are trying to see whether you have been able to successfully troubleshoot the markup coding issues in your site, you need to bear in mind that the reports take time to update. It can take around a week or more for the updated page code to reflect on the reports even after you Validate a Fix.