Well this is probably the issue. I have the Rap Pro Library, Expansion Pack - Universal 120 and version 2 showing; one from Rapture and one from CC download, Biolabs Vol 1, Craig's Minimog Tribute, Dim Pro EP - legacy, DSF Vol 1 Filmscore, DSF - Vol 1 Grand Piano, Hip Hop Producer, Vocal Expressions, Galbanum - Pisics, Gibson EBS, Gibson Gold Top, Rap Classic Factory Library, and Rap Legacy.
That's a lot of expansions right there and if they're scanning all that each time it loads, then I'm not surprised there's a big wait. Work-around to bounce track once finished maybe...or have a batch-resave ability?