AS3 object inexplicably disappears after 1.5 - 2 minutes - actionscript-3

Question

I'm new to as3 but have been learning as I go.
I am creating a container which appears with text field inputs so the user can create a 'post'. This is triggered to occur when an animation is removed from the stage which it does automatically when it has completed.
However after about 1.5-2 minutes the container inexplicably disappears. This is a problem as a user may well want to take more than 2 minutes to make a post.
I cannot for the life of me figure out why this is happening, could it possible be a garbage collection issue?
Any help is greatly appreciated thank you,
Dan
var titleText:Title = new Title();
var titleInput:TextField = new TextField();
var categoryText:Category = new Category();
var categoryInput:TextField = new TextField();
var postText:Text = new Text();
var postInput:TextField = new TextField();
//setup text formats to be used
var postCreationTextFormat:TextFormat = new TextFormat();
postCreationTextFormat.font = "arial";
postCreationTextFormat.size = 20;
postCreationTextFormat.align = "left";
postCreationTextFormat.leftMargin = 2;
//Fade In Post Creation Box after Seed to Bud Animation.
seedToBud.addEventListener(Event.REMOVED_FROM_STAGE, createPostInput);
//Some variables to declare for the createPostInput function.
var postCreationContainer:PostCreationContainer = new PostCreationContainer;
var contentWindow:ContentWindow = new ContentWindow;
var postCreationInputBoxes:PostCreationInputBoxes = new PostCreationInputBoxes;
var thumb:Thumb = new Thumb;
var track:Track = new Track;
var scrollDownArrow:ScrollDownArrow = new ScrollDownArrow;
var scrollUpArrow:ScrollUpArrow = new ScrollUpArrow;
function createPostInput(event:Event)
{
addChild(postCreationContainer);
postCreationContainer.x = 230;
postCreationContainer.y = 400;
postCreationContainer.addChild(track);
track.x = 428;
track.y = 25;
postCreationContainer.addChild(thumb);
thumb.x = 418;
thumb.y = 25;
postCreationContainer.addChild(scrollDownArrow);
scrollDownArrow.x = 418;
scrollDownArrow.y = 269;
postCreationContainer.addChild(scrollUpArrow);
scrollUpArrow.x = 418;
scrollUpArrow.y = 6;
postCreationContainer.addChild(contentWindow);
contentWindow.x = 6;
contentWindow.y = 6;
postCreationContainer.addChild(postCreationInputBoxes);
postCreationInputBoxes.x = 6;
postCreationInputBoxes.y = 6;
postCreationContainer.alpha = 0;
postCreationContainer.addEventListener(Event.ENTER_FRAME, fadeInCreatePostInput);
postCreationInputBoxes.addChild(titleText);
titleText.x = 0;
titleText.y = 0;
postCreationInputBoxes.addChild(titleInput);
postCreationInputBoxes.addChild(categoryText);
categoryText.x = 0;
categoryText.y = 60;
postCreationInputBoxes.addChild(categoryInput);
postCreationInputBoxes.addChild(postText);
postText.x = 0;
postText.y = 124;
postCreationInputBoxes.addChild(postInput);
titleInput.defaultTextFormat = postCreationTextFormat;
titleInput.type = "input";
titleInput.multiline = false;
titleInput.wordWrap = false;
titleInput.maxChars = 150;
titleInput.border = true;
titleInput.width = 403;
titleInput.height = 30;
titleInput.x = 0;
titleInput.y = 32;
titleInput.background = true;
titleInput.backgroundColor = 0xFFFFFF;
categoryInput.defaultTextFormat = postCreationTextFormat;
categoryInput.type = "input";
categoryInput.multiline = false;
categoryInput.wordWrap = false;
categoryInput.maxChars = 150;
categoryInput.border = true;
categoryInput.width = 403;
categoryInput.height = 30;
categoryInput.x = 0;
categoryInput.y = 96;
categoryInput.background = true;
categoryInput.backgroundColor = 0xFFFFFF;
postInput.defaultTextFormat = postCreationTextFormat;
postInput.type = "input";
postInput.multiline = true;
postInput.wordWrap = true;
postInput.maxChars = 500;
postInput.border = true;
postInput.width = 403;
postInput.height = 361.5;
postInput.x = 0;
postInput.y = 156;
postInput.background = true;
postInput.backgroundColor = 0xFFFFFF;
stage.focus = titleInput;
seedToBud.removeEventListener(Event.REMOVED_FROM_STAGE, createPostInput);
}
function fadeInCreatePostInput(event:Event):void
{
postCreationContainer.alpha += 0.05;
if (postCreationContainer.alpha == 1)
{
postCreationContainer.removeEventListener(Event.ENTER_FRAME, fadeInCreatePostInput);
}
}

Answer 1

Do you know for a fact that there are no rounding issues with your alpha incrementer? I'd be checking the integer value of alpha and not the real, floating point value. Or, do a fuzz comparison (alpha >= 1-FUZZ && alpha <= 1+FUZZ) for some small value of FUZZ.