Known issue with Android devices. I have been diligently uploading videos to Naim documenting the issue. And for a few months now I have been getting responses along the line of ‘we’re looking into it’ but nothing more. I am starting to have the distinct impression that Naim can’t be bothered with this… I am now constantly hijacking my wife’s iPad to browse my Uniti Core music collection.
I must be really lucky because I don’t see this issue at all. Is the time it takes to display artists not determined by whatever upnp server you’re using?. FWIW I use Asset on a QNAP NAS with approx 15k tracks and 1200 albums and navigating the Artist view in the Naim app is instant.
You could always try bubbleupnp and see if that makes a difference, but knowing nothing about the Core would it even work with that?