Artwork not showing

[paulr]

Thanks Simon. The recently added file does indeed contain 300 entries - therefore red herring.
Good suggestion to tryi other players/control point.
Bubble upnp not available for iOS.
Mconnect Lite (free) does not have a facility to connect to minim (not that I can see anyway).
I've installed VLC on my iphone, it connects to minimserver, and instantly displays what I expect, except not all artwork. I've checked a few albums and it looks like VLC is showing the album artwork as the naim app.
Gets a bit more murky as time goes on. How come Naim and VLC apps show the same artwork? Surely they have their own cache?