I am getting this issue randomly now as well - lots of halfway through a song, then skip to the next one. No pattern.
2012 MacMini i7 256gb SSD core
Fibre router > D-Link switch > MacMini/Core>PS Audio DS Jr DAC w/B2
This is getting frustrating. Everyday, there’s a new glitch with playback, navigation, searching that has been documented by many others. ALL issues that didn’t exist for me under 1.7 - maybe 1.8 isn’t a massive failure, but it would be helpful if it didn’t seem like it was trying so hard.