If you set up a song with intro and loop parts (only tested when it's inside a separate folder in Music/), it deletes itself whenever you reset. If you go in again without re-adding it, it's quiet and the song display shows the meganeko song. I tested with a single segment song and it seems to remain when you reset.
How to replicate:
Add song with intro/loop parts into cybergrind playlist
How to replicate: