non-default playlist sortings are ignored

[Justus-G]

Describe the bug
When having a playlist which is sorted by e.g. "date added", but descending (newest songs at top), starting the first song results in the queue being empty, while the native Spotify app would play the playlist backwards. Also, double clicking a song from the middle of the playlist, librespot plays the playlist backwards from there on (which is forwards when sorted ascending), while Spotify considers the current sorting of the playlist and plays it in the order it is currently displayed.

To Reproduce
Create a playlist, add at least 2 songs, sort by "date added, descending", start the first (top-most / newest) song.

• behaviour in Spotify app: plays both songs
• behaviour in librespot-java: plays first song, then stops

Expected behavior
Expected librespot-java to behave like the native Spotify application.

Version/Commit
v1.6.3

By the way, other than that this thing works like a charm and has been running 24/7 on a Raspberry Pi for nearly 3 years now. Love it!