Edge date picker of ‘Ext.field.Date‘ is generally used on small form-factor devices. However, bug happens when you use multiple date fields. It was described by RC on stack-overflow and it took a bit more time for me to fix it.

The code of override:

Ext.define('Override.picker.Picker', {
    override: 'Ext.picker.Picker',

    afterShow: function(me) {	
        me.callParent([me]);	
        me.scrollSlotsIntoView();	
        Ext.util.InputBlocker.blockInputs();	
    },
});

Fiddle Link