Question migration does not maintain accepted answer
I'm not referring to the fact that migrated questions will appear to lose their answers when they get migrated to a different site, but when they actually do get migrated, the answers keep their upvotes, downvotes, and comments, but if an answer was accepted pre-migration, it will no longer be considered accepted.
Is this how its suppose to work? If it is, why would a question be considered unresolved just because it moved sites?
(I considered the possibility that the OP might have unmarked it as accepted before it got migrated, but that doesn't seem likely.)