When migrating an entry to the same source as it already is from, the source queues got blocked, preventing any progress.
Since the migration does not do any request to the source of the entry to migrate, it is not required to go through the queue for the source.
In case the search was aborted due to already having found a match, the state was not updated.
Thus, only if the main migration was aborted and not just the "local" manga search, should it exit early on an error.
