./watch is compiling the JS library files mostly but one file it is always caching

[simpledeveloper]

Hi All I am using Ember even though I am making changes but when I run the ./watch its not producing the JavaScript file with new code - its annoying - I am making the manual change but that's not correct solution right? I made the change to the file even by opening in folder and manually updated the code on ember file - still its writing the old code in app.js file. What could be the reason I don't know. I am using Web Pack to run ./watch and generate the app.js file Here is my Ember js code:

export default () => {
IMS.registerController("case.details.assignedinspector.edit", {

caseDetails: Ember.inject.controller('caseDetails'),
caseId: Ember.computed.alias('caseDetails.model.imscase.id'),
clearForm: function () {
    $('.modal').modal('hide');
},
actions: {
    close: function (id) {
        $('.modal').modal('hide');
        this.transitionToRoute('case.details');
    },

    async save() {
        var scope = this;

        //validating form
        if ($("#edit-assignedinspector-form").validate()) {
            var data = {                    
                AssignedToInvestigators: Ember.get(scope, 'model.imscase.assignedToInvestigators'), //AssignedToInspectorId: $("#assignedInspectorSelect").chosen().val(),
                CaseId: this.get('caseId')
            };
            try {
                let response = await this.api('Case/UpdateAssignedInvestigators').post(data);
                $('.modal').modal('hide');
                toastr.success("Assigned Inspector Edit Saved.");
                scope.transitionToRoute("case.details");
                scope.get('caseDetails').refreshData();
                scope.clearForm();
            } catch (ex) {
                toastr.error("Error saving Assigned Inspector.");
            }
        }
        else {
            toastr.warning("Please fix the form", "Validation failed");
        }
    },
    didInsert: function () {
        $('#edit-assignedinspector-modal').modal();
    }
}

});
}

Here is how its generating the old code in app.js file - any help please?

  save: function () {
    var \_save = \_asyncToGenerator(
    /\*#\_\_PURE\_\_\*/
    regeneratorRuntime.mark(function \_callee() {
      var scope, data, response;
      return regeneratorRuntime.wrap(function \_callee$(\_context) {
        while (1) {