Just as an FYI, several years ago (think Captivate 2 or 3) we would see issues with what I called the "red screen of death". And that's precisely how it began to manifest, As you played the project, a red block would appear. Then two or three more. And eventually, the entire screen would go red and you were done until you closed and restarted the page.
My own analysis revealed it was fairly easy to recreate. The gist of it was that Captivate had an issue where all available computer memory was being used. As the memory ran out, the blocks began to appear.
So keep an eye on it. My guess is that maybe some memory leak is occurring. Don't be too surprised if it happens to rear its ugly little head again.
Cheers... Rick