The only thing I can think of that caused the bug was that I closed the Chromebook while the game was running. As for the hacks, if you mean that the hacks end when I change tabs in Chrome, that wasn't what happened. I had the game open, and it flashed the screen before ending. This lasted for a minute, so I assumed it was a part of the bug.
As for the dialogue, a specific tab or subtab of the console would be a reasonable way to have it, as it couldn't get drowned out. That's up to you, however.
I also think there should be a way to reset your account, as making a new one every time would be tedious.