When I sync an Amazon Music playlist, some of the tracks don't successfully sync.

If some or all of the tracks in your playlist don't successfully sync, first try to sync the playlist a second time. If that doesn't resolve the issue, then it's possible that the tracks that did not sync are not eligible to be taken offline in your country.

Note: There's a known issue where playlists with more than 300 tracks may not sync in full. As a workaround, you can split the individual playlist into multiple playlists, each with fewer than 300 tracks. We're working to resolve this issue.