This is a possible fix, but then a track change notification would occur if you delete a cp (current playlist) track prior to the currently playing track:

-   if self.nowPlaying ~= nowPlaying then
+   if self.nowPlaying ~= nowPlaying or self.state["playlist_cur_index"] ~= oldState["playlist_cur_index"] then
       log:warn('notify_playerTrackChange')
       self.nowPlaying = nowPlaying
       self.jnt:notify('playerTrackChange', self, nowPlaying)
   end