Editor cannot disappear after closing Window

[disller]

Hi There,
I got a problem on Ext 4.1.0 and Ext 4.1.1

Double click first cell to edit it and then click window close button, the editor still floats on the page.But it is ok for last cell.

Anyone met this problem before? Thanks

Ext.onReady(function(){
	
	
	Ext.create('Ext.data.Store', {
	    storeId:'simpsonsStore',
	    fields:['name', 'email', 'phone'],
	    data:{'items':[
	        { 'name': 'Lisa',  "email":"lisa@simpsons.com",  "phone":"1224"  },
	        { 'name': 'Bart',  "email":"bart@simpsons.com",  "phone":"1234" },
	        { 'name': 'Homer', "email":"home@simpsons.com",  "phone":"1244"  },
	        { 'name': 'Marge', "email":"marge@simpsons.com", "phone":"1254"  }
	    ]},
	    proxy: {
	        type: 'memory',
	        reader: {
	            type: 'json',
	            root: 'items'
	        }
	    }
	});

	var table = Ext.create('Ext.grid.Panel', {
	    title: 'Simpsons',
	    store: Ext.data.StoreManager.lookup('simpsonsStore'),
	    columns: [
	        { text: 'Name',  dataIndex: 'name',editor:{xtype:'textfield',toFrontOnShow:false} },
	        { text: 'Email', dataIndex: 'email', flex: 1 },
	        { text: 'Phone', dataIndex: 'phone',editor:{xtype:'numberfield',hideTrigger: true,validateOnChange : false} }
	    ],
	    height: 200,
	    width: 400,
		plugins:[ Ext.create('Ext.grid.plugin.CellEditing', {
        clicksToEdit: 2,
      })]
	});


var window = new Ext.Window({
                          id: 'abc',
                          title :'abc',
                          modal : true,
            layout: 'border',
                          resizable : true,
                          draggable : true,
                          closable : true,
                          closeAction : 'hide',
                          width :410,
                          height :210,
                          items : [ table]
                  });

window.show();
	
});

[disller]

Is it a bug or my code issue?
Anyone can give me a workaround to fix it?

Thanks