When they get fixed will the medals be "restarted"?Medals won't be reset, no.
I don't think people that didn't get certain medals while they should have gotten them will get them once a fix is pushed though. They'll likely have to achieve a new score to get the medal. (It's possible that I'm wrong here, so don't take my word for it.)
Fixing the star ratings -> It is likely that the Mania medals will be wiped, because "incorrect star rating" = "incorrect medals awarded"The medals seem to be awarded based on the star rating visible on the web, which seems to be lower than the one in the client. If this is the case I don't think they'll be wiped given that no one got a medal when they shouldn't have.
<posts>Posting in either this thread or the other ones is fine, but posting in this one is preferred.
Thanks for the investigation there.