Issue : Adding scripts inside nested content showing different behavior when compared with a single content ta

The  following is the snippet that we tried adding  : 
editor.BlockManager.add('image_left_text_right',{
            id: 'LiRt',
            label: 'Left Text,Right Image',            
            attributes: { class:'gjs-fonts gjs-f-h1p'},
            copyable:true,
            content:
            {
                style:{ classes:"row,cell",droppable:true, draggable:true,copyable:true,removable:true,toolbar: [{
              attributes: {class: 'fa fa-arrows'},
              command: 'tlb-move',
              },{
              attributes: {class: 'fa fa-clone'},
              command: 'tlb-clone',
              }]},                
                content:                 
                `
                <div class="row" data-gjs-custom-name="Row">
                    <div class="cell" data-gjs-draggable="false" data-gjs-droppable=".buttonCss" data-gjs-droppable="false" data-gjs-copyable="false"  data-gjs-removable="false" data-gjs-custom-name="Cell">                       
                      <h1 data-gjs-droppable="false" data-gjs-draggable="false" data-gjs-copyable="false"  data-gjs-removable="false">Section Title</h1>                          
                      <div class="cell" data-gjs-draggable="false" data-gjs-droppable="false" data-gjs-copyable="false"  data-gjs-removable="false" data-gjs-custom-name="Cell padd">Passage Description</div>                          
                    </div>         
                    <div class="cell" data-gjs-draggable="false" data-gjs-droppable="false" data-gjs-copyable="false"  data-gjs-removable="false" data-gjs-custom-name="Cell">
                      <input type="file" accept="image/*" id = "LiRtid" >
                      <img id="output" style="width:250px;height:250px" data-gjs-draggable="false" data-gjs-droppable="false" data-gjs-copyable="false"  data-gjs-removable="false"/>
                    </div>               
                </div>
                `,

              script:        
                ` var input1 = document.getElementById('LiRtid');
                  input1.addEventListener('change', function()
                  {                     
                    var output = document.getElementById('output');
                    alert(output);
                    output.src = URL.createObjectURL(this.files[0]);
                  });`,
              droppable:false,
              draggable:".panel",              
           
              },            
        })

![image](https://user-images.githubusercontent.com/9292835/41405293-1469d2d2-6fe7-11e8-8b30-a673944a5fa1.png)

Any help is appreciated . Thanks in advance!!...