vuejs payload only emitting first element in an array

im using the dropzone plugin with vuejs and the response from dropzone is an array. The payload has an array of arguments, a response and the file object. Every time i call @vdropzone-success="$emit('processFunction',$event) it will correctly send the request to the right function but only the first element of the payload array is returned. Why? I have attached a screenshot of the vue debugger to help illustrate the problem. How can i access the payload in processFunction to get to array element 0 and 1?

to add more context. This is the function in the library that is emitting to my child component

    this.dropzone.on("success", function(file, response) {
  vm.$emit("vdropzone-success", file, response);
});

after this in my vue code i am emitting this result to my index component:

      <vue-dropzone
        id="dropzone"
        ref="myVueDropzone"
        @vdropzone-drop="$emit('loading')"
        @vdropzone-success="$emit('loaded',...$event)"
        :use-custom-slot="true"
        :options="dropzoneOptions"
      >

I am binding to the element on my index.vue here:

 <Upload  @loading="loading" @loaded="loaded" />

to then call the function loaded

loaded(e) {
  console.log(e);
  this.notLoading = true;
  this.isLoading = false;
},

https://github.com/vuejs/vue/issues/5527 this looks like A similar problem. Whenever i call $event it only returns 0 which is the file. I want it to return 1 which is the response from the serve (Object).

ok.. I feel like there should be a better way to do this, but... it looks like i can't pass the array variable through the vue tags from the library->child->parent directly. Instead I need to pull the array out in js in the child, and re-emit it in the js to the parent. the below solution worked.

library:

  this.dropzone.on("success", function(file, response) {

vm.$emit("vdropzone-success", file, response); });

child (helper.vue):

          <!-- file upload -->
      <vue-dropzone
        id="dropzone"
        ref="myVueDropzone"
        @vdropzone-drop="$emit('loading')"
        @vdropzone-success="processdata"
        :use-custom-slot="true"
        :options="dropzoneOptions"
      >

and the js part of that

methods: {
processdata(...ev){
  this.$emit("loaded",ev);
},

and finally the parent (index.vue)

<Upload  @loading="loading" @loaded="loaded" />

and the js for that

loaded(...e) {
  this.storedValue = e;

not the most elegant solution, but it is working!