Hello everyone,
I commissioned a java developer to build the code below to record participants' reaction times, meaning how long it takes from the offset of a stimulus on screen to participant pressing a response key. Unfortunately the code does not work, as half of the times it exports the reaction times as 000, like the example below:
correct export: 1131,220,135,330,74,1697,1151,676,668,303,373
wrong export: 127,167,160,157,110,000,000,000,000,000,000
Below I share the full code. Any idea of why this might be the case will be really appreciated.

var t;
Qualtrics.SurveyEngine.addOnload(function() {
  /*Place your JavaScript here to run when the page loads*/
 jQuery("#Buttons").hide();
});
Qualtrics.SurveyEngine.addOnReady(function() {
  /*Place your JavaScript here to run when the page is fully displayed*/
 var qid = this.questionId;
jQuery("#"+qid+" .QuestionText").css("padding-bottom","0px");
jQuery("#"+qid+" .ChoiceStructure").css("border-spacing","3px 0px");
  var align = "${e://Field/alignment}";
  var time = parseInt("${e://Field/time}");
var curri = 0;
  console.log(time)
jQuery("#Buttons").hide();
  this.hideNextButton();
  this.hidePreviousButton();
  jQuery("#" + qid + " .QuestionBody").css("pointer-events", "none");
  var that = this;
  var c = 0;
var currchoice= "";
  var timer_is_on = 0;
  function timedCount() {
    c = c + 1;
    t = setTimeout(timedCount, 1);
  }
  function startCount() {
    c = 0;
    if (!timer_is_on) {
      timer_is_on = 1;
      timedCount();
    }
  }
  function stopCount() {
    clearTimeout(t);
    timer_is_on = 0;
  }
jQuery(document).on('keydown', function(event) {
    if (!timer_is_on) {
      return;
    }
    var key = event.key.toUpperCase();
    if (align == "left") {
      if (key == "A") {
        jQuery('inputUtype="checkbox"]:eq(1)').prop('checked', true); //No
currchoice = "0";
        jQuery("#NextButton").click();
} else if (key == "L") {
 jQuery('inputbtype="checkbox"]:eq(0)').prop('checked', true); //YES
currchoice = "1";
        jQuery("#NextButton").click();
      }
    } else {
      if (key == "A") {
        jQuery('input currchoice = "1";
        jQuery("#NextButton").click();
      } else if (key == "L") {
        jQuery('inputrtype="checkbox"]:eq(1)').prop('checked', true); //NO
currchoice = "0";
        jQuery("#NextButton").click();
      }
    }
console.log(currchoice);
  });
  var targetid = "imgr";
  if (align == "left") {
    var el = jQuery('#' + qid + ' .LabelContainer:eq(0)').detach();
    jQuery("#" + qid + " .ChoiceStructure tbody tr").append(el);
    jQuery(".no").text('A');
    jQuery(".yes").text('L');
    targetid = "imgl";
    jQuery("#imgr").attr('src', "${lm://Field/1}");
   jQuery("#"+targetid).on('load', function() {
if(curri==0)return;
       setTimeout(function() {
curri=0;
                jQuery("#"+targetid).show().attr("src", "https://cardiffmet.eu.qualtrics.com/ControlPanel/Graphic.php?IM=IM_0iyWXtOyRB7QZqR");
        jQuery("#" + qid + " .QuestionBody").show();
        startCount();
      }, time);
    });
curri = 0;
        jQuery("#" + targetid).attr("src", "https://cardiffmet.eu.qualtrics.com/ControlPanel/Graphic.php?IM=IM_87CytKMbs8ODCbX");
    setTimeout(function() {
curri = 1;
      jQuery("#" + targetid).attr('src', "${lm://Field/2}");
    }, 1000);
  } else {
jQuery("#imgl").attr('src', "${lm://Field/1}");
    jQuery("#"+targetid).on('load', function() {
//herererere
if(curri==0)return;
       setTimeout(function() {
curri=0;
                jQuery("#"+targetid).show().attr("src", "https://cardiffmet.eu.qualtrics.com/ControlPanel/Graphic.php?IM=IM_0iyWXtOyRB7QZqR");
        jQuery("#" + qid + " .QuestionBody").show();
        startCount();
      }, time);
    });
curri = 0;
        jQuery("#" + targetid).attr("src", "https://cardiffmet.eu.qualtrics.com/ControlPanel/Graphic.php?IM=IM_87CytKMbs8ODCbX");
    setTimeout(function() {
curri = 1;
      jQuery("#" + targetid).attr('src', "${lm://Field/2}");
    }, 1000);
    //jQuery("#imgr").attr('src',"${lm://Field/2}");
      }
  jQuery("#NextButton").on('click', function() {
    var s = "${e://Field/T3BL1_Sequence}";
    var arr;
    if (s == "") {
      arr = e];
    } else {
      arr = s.split(",");
    }
    arr.push("${lm://Field/3}");
    Qualtrics.SurveyEngine.setEmbeddedData("T3BL1_Sequence", arr.toString());
s = "${e://Field/T3BL1_ReactionTime}";
    arr=u];
    if (s == "") {
      arr = �];
    } else {
      arr = s.split(",");
    }
    arr.push(c);
    Qualtrics.SurveyEngine.setEmbeddedData("T3BL1_ReactionTime", arr.toString());
s = "${e://Field/T3BL1_Choices}";
    arr=d];
    if (s == "") {
      arr = .];
    } else {
      arr = s.split(",");
    }
    arr.push(currchoice);
    Qualtrics.SurveyEngine.setEmbeddedData("T3BL1_Choices", arr.toString());
  });
});
Qualtrics.SurveyEngine.addOnUnload(function() {
  /*Place your JavaScript here to run when the page is unloaded*/
  clearTimeout(t);
  jQuery(document).off("keydown");
});