Memory Leak Help - ext-fx-animation-slide

I have a Component which I am using as a message toast.

The Component requires Ext.sheet to take advantage of hideAnimation/showAnimation

I am adding a couple listeners to detect when the component is shown/hidden so that I can hide the component after its shown and then destroy the component after its hidden.

Code:

Ext.define("Ext.ux.toast.MessageToast", {    extend: 'Ext.Component',
    
    requires: [
        'Ext.Sheet'
    ],
    
    xtype: 'messagetoast',


    config: {
        message: '',
        html : '',
        hideAnimation: {
            type: 'slideOut',
            direction: 'up',
            duration: 1000
        },
        showAnimation: {
            type: 'slideIn',
            duration: 1000,
            direction: 'down'
        },
        hidden: true,
        inAnimation: false
    },


    initialize: function(){
        var me = this;


        this.setHtml(this.getMessage());
        this.addCls("messagetoast");
        
        this.addListener({show:function(){setTimeout(function(){me.hide();},2000);}});
        this.addListener({hide:function(){me.destroy();}});


        this.callParent(arguments);


    },


    showToast: function() {
        Ext.Viewport.add(this);
        this.show();
    },


    showToastIn: function(container) {
        var me = this;
        container.add(me);
        me.show();


    }

});

If I repeat the process of creating and destroying MessageToast Components then I get memory leaks.

In the Ext.Animator.managedListeners there are some classes associated with the MessageToast components I am creating which never get cleared out.

E.g.

I can find the following class which never gets cleared out after a destroy.

Ext.Animator.managedListeners['ext-fx-animation-slide-5'].destroy[0].scope

Code:

_direction: "down"
_duration: 1000
_easing: "ease-out"
_element: Ext.apply.create.Class
_onEnd: function () {config: Ext.Object.classify.objectClasseventDispatcher: Ext.apply.create.ClassgetEventDispatcher: function () {getId: function () {getObservableId: function () {getUniqueId: function () {id: "ext-fx-animation-slide-5"initConfig: function (){}initialConfig: Ext.Object.classify.objectClassinitialized: truemanagedListeners: ObjectobservableId: "#ext-fx-animation-slide-5"startTime: 1423188952847states: ObjectusedSelectors: Array[1]__proto__:

Any Idea why these memory leaks are occurring and what I can do to avoid them?

Thank you

Memory Leak Help - ext-fx-animation-slide