The custom block doesn't execute its script when autoloaded from localStorage

I'm using the following code for my custom block, and it works when the block is dropped on the canvas.
But when the block is loaded from localStorage, it only creates a div wrapper and doesn't execute the content.script part of custom block.<br>
I tried simplifying the script property to just alert or console call but it didn't help. No errors in console.

      blockManager.add('a3-owl-carousel', {
        label: 'Owl Carousel',
        content:{
          type: 'slider',
          script: function(){                         
            var _component = this;

            (function($){                
                $.get('http://localhost:8080/content/hr.json', function(data){
                  $.get('http://localhost:8080/content/slider.twig', function(twig_template){
                    var template = Twig.twig({data: twig_template});                    

                    $(_component).html(template.render(data));
                  });      
                }); 
            })(jQuery);
          } 
        }    
      });      `