The dropouts I have experienced with the new DDJ-FLX10 might be related to the Track Separation engine being enabled while in the background Rekordbox analyzing multiple tracks. If I disable the Track Separation engine, it significantly reduces the dropouts. I have an 8th generation Core i7 with 16 GB Ram, but it might be the bare minimum that is required.
Still, certainly lots of enhancements that Pioneer must work on for Rekordbox.