Large music collection

I have a large (1.04tb / 100,000 songs) music collection in an external hard drive attached to my RS250a The collection is fully indexed and I can search for any specific song / album / artist but on the App I can only scroll to about “b” in albums or songs. Also, between listening sessions, the artwork on the app disappears- it is there and comes back if I load the album but much of the collection shows the HiFi Rose logo when I open the app.

Take a look here.