I have a Panel with 'Card' layout, there are 3 items in it and i want it to show any one item at a particular moment, in general it should show the first item, but I am facing a weird problem - initially it is showing first 2 items together, by inspecting the debugger I can find the active item to be the first one but in UI it's showing 1st and 2 nd item, so I ran a test in console - if i force to show the first item by Ext.getCmp('id').layout.setActiveItem(0) it still shows first 2 items, but if i use Ext.getCmp('id').layout.setActiveItem(1) or Ext.getCmp('id').layout.setActiveItem(2) I get expected result, and most interesting behavior is after executing Ext.getCmp('id').layout.setActiveItem(1) (or 2) if i try Ext.getCmp('id').layout.setActiveItem(0) I get the expected result i.e. only first item is visible!! Any possible explanation for this?