[Syncopation]

macOS 10.14.2
Kodi18RC4
Reproduce:

1. navigate to music section
   
2. select update library from the left side menu
   
3. update is happening, but it never finishes (in very single case I tried to reproduce this)
   

This has happened for a long time and is not limited to 18RC4. When then trying to force quit, kodi becomes unresponsive.