like @JMills I think that it would be great to push/import the defect attribute to new test runs created with the rerun function (maybe an option check for fields to import in the status filter dialog)
We have integrated TestRail with JIRA so in the defect field we have linked to JIRA issues. It would be great to have those fields and links in the newly created test run so that we could easily see when that issue is resolved and then retest.
I guess that through the API this can be done, but it would be a great addition to the web app too.
Thanks and regards,