When updating, remove songs first, then add. This way if a non-key field is updated, song wont disappear!

devices/device.cpp

@@ -107,12 +107,12 @@ void Device::applyUpdate()
         QSet<Song> removed=currentSongs-updateSongs;
         QSet<Song> added=updateSongs-currentSongs;
 
-        foreach (const Song &s, added) {
-            addSongToList(s);
-        }
         foreach (const Song &s, removed) {
             removeSongFromList(s);
         }
+        foreach (const Song &s, added) {
+            addSongToList(s);
+        }
         delete update;
     } else*/ {
         int oldCount=childCount();

models/musiclibrarymodel.cpp

@@ -545,12 +545,12 @@ bool MusicLibraryModel::update(const QSet<Song> &songs)
     QSet<Song> added=updateSongs-currentSongs;
 
     bool updatedSongs=added.count()||removed.count();
-    foreach (const Song &s, added) {
-        addSongToList(s);
-    }
     foreach (const Song &s, removed) {
         removeSongFromList(s);
     }
+    foreach (const Song &s, added) {
+        addSongToList(s);
+    }
     return updatedSongs;
 }