puck.js not reliable

I use a puck.js for sending midi controller over bluetooth. It worked for while (on 2 different computers, Win and OSX) but after a while, the puck stops been reliable. It sends the midi data and then stops working. It doesn't respond anymore and I have to upload the code again to be able to use it. Any idea what the problem could be? Is it possible the puck is defective?

I upgraded the firmware to 2.04 with no success.

This is the code:

var midi = require("ble_midi");

midi.init();
setWatch(function(e){
  var isLong = (e.time-e.lastTime)>1;
  console.log(isLong);
  if (isLong) {
    midi.send(0, 101, 100);
setTimeout(function() {
midi.send(0, 101, 100);
digitalPulse(LED1,1,5);}, 100);
  } else {
    midi.send(0, 126, 100);
    digitalPulse(LED2,1,5);
  }
}, BTN, {repeat:true, debounce:50, edge:"falling"});