I’m an user of Glider and Chord Poly. The app works perfect at the version 2.0. But after I upgraded it to version 2.1, it can’t sync all of my songs. It can only sync about 2.4k songs, but there’re about 13k songs in my Poly (the 2.0 version correctly syncs 13k songs).
At the new version, when it sync about 2.4k songs, it stops the syncing process and immediately turns to verifying metadata. After that, it finishes all the process.