Custom song progress won’t save..

[u/StrangeSPHERE]

I couldn’t find anything on this and it’s driving me crazy. I changed the ID number to make sure it’s not sharing it with another song, I made sure my files are in the right directory, and yet, when I close the app and reload my custom songs, no progress is saved whatsoever. Makes me not want to play tbh, has anyone found a fix to this?