I don’t know if this has been discussed, but after upgrading the server to the new scraper it adds actors and directors as entirely new entries. For example, I added a Ridley Scott movie to my collection, and now there are two results for “Ridley Scott director” in Movies, one with the existing 8 features, and the new one I just added also under Ridley Scott but with only one result from the new scan.
Refreshing the library metadata should sort this for good. Alternatively you can wait for approx. 1 week for the scheduled maintenance tasks to iron it out.