leadtools annotation example drawing the first time then not drawing

 window.onload = function () {
                // Get the container DIV
                var imageViewerDiv = document.getElementById("imageViewerDiv");
                // Create the image viewer inside it
                var createOptions = new lt.Controls.ImageViewerCreateOptions(imageViewerDiv);
                var imageViewer = new lt.Controls.ImageViewer(createOptions);
                // Add handler to show an alert on errors
                imageViewer.itemError.add(function (sender, e) {
                   alert("Error loading " + e.data.srcElement.src);
                });
                imageViewer.imageUrl = "cannon.png";
            
                // Create and set up the automation manager using the HTML5 rendering engine
                var renderingEngine = new lt.Annotations.Rendering.AnnHtml5RenderingEngine();
                var manager = new lt.Annotations.Automation.AnnAutomationManager.create(renderingEngine);
            
                // Create the default annotations objects 
                manager.createDefaultObjects();
                manager.editObjectAfterDraw = false;
            
                var currentObject = document.getElementById("currentObject");
            
                var automationObjCount = manager.objects.count;
                for (var i = 0; i < automationObjCount; i++) {
                   // Get the object 
                   var automationObj = manager.objects.item(i);
            
                   // Add its name to the select element 
                   var name = automationObj.name;
                   var id = automationObj.id;
                   currentObject.options[currentObject.options.length] = new Option(name, id);
                }
            
                // Hook to its change event
                currentObject.addEventListener("change", function () {
                   // Get the object ID
                   var id = parseInt(currentObject.options[currentObject.selectedIndex].value);
            
                   // Set it as the current object in the manager 
                   manager.currentObjectId = id;
                });
            
                // When the current object ID changes, we need to update our select
                manager.currentObjectIdChanged.add(function (sender, e) {
                   var currentObjectId = manager.currentObjectId;
                   for (var i = 0; i < currentObject.options.length; i++) {
                      var id = parseInt(currentObject.options[i].value);
                      if (id === currentObjectId) {
                         currentObject.selectedIndex = i;
                         break;
                      }
                   }
                });
            
                var userMode = document.getElementById("userMode");
                // Hook to its change event 
                userMode.addEventListener("change", function () {
                   // Get the selected mode 
                   var mode = userMode.options[userMode.selectedIndex].innerHTML;
                   if (mode == "Design") {
                      manager.userMode = lt.Annotations.Core.AnnUserMode.design;
                   } else {
                      manager.userMode = lt.Annotations.Core.AnnUserMode.run;
                   }
                });
            
                // Create an instance of the Automation control object that works with LEADTOOLS ImageViewer
                var automationControl = new lt.Annotations.JavaScript.ImageViewerAutomationControl();
                // Attach our image viewer
                automationControl.imageViewer = imageViewer;
            
                // Set the image viewer interactive mode 
                var automationInteractiveMode = new lt.Annotations.JavaScript.AutomationInteractiveMode();
                automationInteractiveMode.automationControl = automationControl;
                imageViewer.defaultInteractiveMode = automationInteractiveMode;
            
                // set up the automation (will create the container as well)
                var automation = new lt.Annotations.Automation.AnnAutomation(manager, automationControl);
                // Add handler to update the container size when the image size changes
                imageViewer.itemChanged.add(function (sender, e) {
                   var container = automation.container;
                   container.size = container.mapper.sizeToContainerCoordinates(imageViewer.imageSize);
                });
            
                // set up this automation as the active one
                automation.active = true;
            
                // Hook to the run even so we know when an object enters run mode 
                automation.run.add(function (sender, e) {
                   // e is of type AnnRunDesignerEventArgs 
                   if (e.operationStatus == lt.Annotations.Core.AnnDesignerOperationStatus.start) {
                      // Get the object being run 
                      alert("In run mode, you clicked an object of id " + e.object.id);
                   }
                });
            
                // Optional: Add the resources to the container
                addResources(automation.container);
             }
             
             function addResources(container) {
                // Add images for the stamp, point, hot spot, and lock annotations
                var resources = new lt.Annotations.Core.AnnResources();
                container.resources = resources;
                var rubberStampsResources = resources.rubberStamps;
                var imagesResources = resources.images;
            
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampApproved] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/approved.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampAssigned] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Assigned.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampClient] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Client.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampChecked] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/checked.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampCopy] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Copy.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampDraft] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Draft.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampExtended] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Extended.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampFax] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Fax.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampFaxed] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Faxed.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampImportant] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Important.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampInvoice] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Invoice.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampNotice] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Notice.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampPaid] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Paid.png");
            
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampOfficial] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Official.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampOnFile] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Onfile.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampPassed] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Passed.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampPending] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Pending.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampProcessed] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Processed.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampReceived] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Received.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampRejected] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/rejected.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampRelease] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Release.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampSent] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Sent.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampShipped] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/Shipped.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampTopSecret] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/topsecret.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampUrgent] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/urgent.png");
                rubberStampsResources[lt.Annotations.Core.AnnRubberStampType.stampVoid] = new lt.Annotations.Core.AnnPicture("resources/objects/RubberStamps/void.png");
            
                imagesResources.add(new lt.Annotations.Core.AnnPicture("resources/objects/Point.png"));
                imagesResources.add(new lt.Annotations.Core.AnnPicture("resources/objects/lock.png"));
                imagesResources.add(new lt.Annotations.Core.AnnPicture("resources/objects/hotspot.png"));
             }