If a repo has moved, then github will redirect from the old to the new, if it can.
If you look at Email::Valid, you'll see that the Repository and Issues links don't work right, because they're redirected.
Credit due to csson who worked out what the problem was -- I just noticed that the links weren't working. I've filed a PR on Email::Valid to try and prompt a release, which should update the META.* files, but would be good to fix this in MetaCPAN too, as redirects aren't that uncommon.