[aldente]

I'm guessing the library on Kore is out-of-sync. Have you tried to refresh the music library in Kore?

@poisdeux,

Thank you for your reply. Yes, that was the solution!  Originally on Kore, I had done "Library Maintenance > Clean audio library" then "Library Maintenance > Update audio library", but it did not resolve the problem.

This time, I first cleaned up and imported music library from the PC screen completely. On Kore, Music > Refresh took several seconds before completing a refresh from an empty list. Now whatever I select on Kore Remote plays that song instead of something else.

Thank you.