If the flash object is placed in 0px div, the creationComplete event is fired after a long wait time

Question

<Problem>
My requirement is to hide flash object on browser. However, If the flash object is placed in 0px div, the creationComplete event is fired after a long wait time. Is this a bug of Flex? (or Flash Player?)
<Sample Code>
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
          initialize="app_initialize(event);" creationComplete="app_creationComplete(event);" >
<mx:Script>
        <![CDATA[
        import mx.events.FlexEvent;
    private function app_initialize(evt:mx.events.FlexEvent):void
              ExternalInterface.call("alert", "application initialize.");
    private function app_creationComplete(evt:mx.events.FlexEvent):void
              ExternalInterface.call("alert", "application creation complete.");
    private function button_creationComplete(evt:mx.events.FlexEvent):void
              ExternalInterface.call("alert", "button creation complete.");
        ]]>
    </mx:Script>
    <mx:Button id="testButton"  label="button"  creationComplete="button_creationComplete(event);"/>
</mx:Application>
<Steps to reproduce>
1) Dowload the following samples
MySwf-src.zip
https://files.acrobat.com/a/preview/c6b7a191-c6c4-486f-9345-e2b5c21a4c0b
TestSwf.zip
https://files.acrobat.com/a/preview/98e613e1-63b1-4b2f-93f3-f6e4f4a27f24
2) Unzip TestSwf.zip.
3) Copy MySwf.swf, TestInvisible.html, and TestVisible.html to "c:\inetpub\wwwroot\". (Need to install the IIS.)
4) Visit "http://localhost/TestVisible.html" via IE. notice the creationComplete event fired after initialize event immediately.  -- Correct
5) Visit "http://localhost/TestInvisible.html" via IE. notice the creationComplete event fired a long time after initialize event.  -- Incorrect
<Environment>
Win8.1x64+IIS8.5+IE11+Flash player(13.0.0.182)
<Note>
If the flash object is placed in 1px or larger div, the creationComplete event is fired immediately.
The problem occurs with other browsers(IE9,IE10,FF,Chrome) too.

Answer 1

Thank you for your response. The computers are indeed running Flash Pro CC 13.1.0.226. I tried to generate a minidump file on four different computers where Flash Pro hung, but was not able to do so on any of them as Flash Pro makes the entire system unresponsive. I get the spinning circle cursor and then the GUI of all apps greys out and fails to update. I don't actually get any sort of error message; everything simply stops responding.
I was probably unclear above; even if I can alt-tab I can't really interact with any other programs once Flash Pro hangs beyond one or two mouse clicks. So on some computers I could right-click on the process in Process Explorer and choose to create a minidump, which then froze, or I might right-click on the process and have it immediatly freeze. I've experienced about two dozen crashes and I've never been able to really use another program or even kill the Flash process in task manager. I also have to power off the computer by holding down the power button, since while I might be able to open the Start menu I can't reach the point of being able to shut it down without it freezing.
From what I was able to see in Process Explorer, Flash Pro was using <1% CPU and 120M private / 170M working memory.