Removing compositeField throws field.el.dom is undefined

[yucatanyeti]

I am getting the following error when a component is removed from a fieldSet inside a form.
field.el.dom is undefined field.el.dom.qtip = '';

Is there some configuration setting I am missing?

var AttributeFieldSet = new Ext.form.FieldSet({
    checkboxToggle: true,
    id: 'AttributeFieldSet',
    title: 'Search by Attribute',
    collapsed: true,
    items: [
    new Ext.Button({
        text: 'Add Attributes',
        handler: addAttributeCompositeField,
        autoHeight: true,
        autoWidth: true,
        iconCls: 'icon-plus'
    })]
});

var docs = new Ext.FormPanel({
    id: 'reqBrowseForm',
    autoHeight: true,
    bodyBorder: true,
    autoDestroy: false,
    layout: 'form',
    frame: true,
    defaultType: 'textfield',
    items: [docTypeComboBox, docName, viewComboBox, AttributeFieldSet],
    buttons: [{
        text: 'Search',
        handler: docsSubmitForm
    }, {
        text: 'Clear',
        handler: function () {
            docs.form.reset();
            docs.trackLabels = true;
            //AttributeFieldSet.collapse(true);
            console.log('attributeIndex:' + attributeIndex);
            if (attributeIndex > 2) for (attributeIndex; attributeIndex > 2; attributeIndex--) {
                console.log(attributeIndex);
                AttributeFieldSet.remove(AttributeFieldSet.get(AttributeFieldSet.items.length - 1))
                AttributeFieldSet.doLayout();

            }
        }
    }
    }]
});

[pouniok]

Having the same issue on Ext 3.4.0.

Did you find a solution to that problem ?