Ext JS 5 Button issues with IE11

Here's my button <span id="clickButton" data-ref="clickButtonInner" unselectable="on" class="x-btn-inner x-btn-inner-default-small">clickME</span>



$('#clickButton').click();

or

var clickButton=Ext.ComponentQuery.query('button[itemId=buttonID]')[0];

clickButton.fireEvent('click',clickButton);





Why does this not work to click it in IE11? webpage is scripted in EXT JS 5+.

Ext JS 5 Button issues with IE11