It doesn't play when setState has been set inside durationHandler

[jr2wolfgang]

Everything works except when you implement the slider. I observed that if this code is present:

advancedPlayer.durationHandler = (d) => setState(() { _duration = d; });

`advancedPlayer.positionHandler = (p) => setState(() {
      _position = p;
    });`

Code above prevents the mp3 to not to play. But when I comment this specific line of code, the mp3 works again.
Do you think what happened?

I notice that when you put setState inside the durationHandler or positionHandle, it doesn't work