Hello!
Recently I discovered another problem with previwe player: sometimes, when I try to quickly prelisten a song, and "jump" to different points of the song, the song plays normal/continuously from the begining. I can't associate this issue with anything when this happens, I can only say that it happened in different sets.
Some kind of solution that I found is to stop the song in the preview player and start the song again, wait a fiew seconds, and try again to jump trough song. I could interpret this as the song not loading properly/complete in the preview player, although the complete waveform appears. But this "solution" means lost time, time that is very precious when you are live during a set and you have to quickly choose the next song.
I hope I made myself understood :) Thanks!