CRM2013 - onChange not triggered when removing value for a required field

Hi There.

I have an issue when onChange event for CRM 2013 environment (on-premise and online)

The onChange event is not fired when removing value for a business required / mandatory field.

var nameChange = function()
{
    var name = Xrm.Page.getAttribute("name").getValue();
    //my customer logic here. For example, disable / hide fields 
};

Has anyone else had the same issue for their development?

Regards,

Jaimie