When I run emails through the Litmus checklist process I'm getting several links flagged as being broken. In almost all of the cases, the links work fine. This is causing the emails to get flagged as spam/junk in some instances.

I've added the link to Google's search console so it gets crawled and that seems to resolve the issue. It even pulls the email out of the spam folder.

Can anyone explain why this is happening and if there is a solution? Many, but not all, of the links are pointing back at our own website.