When you are working in the API playground, after extensive usage, you get to a point where you run a prompt and then everything goes black... only to return to a missing history. I SUSPECT that when the history gets too long, it overflows/crashes and then resets the history database, erasing all your previous history. This is HIGHLY annoying as I keep losing my work randomly while working in the playground.
This has occured 6 TIMES already over the past week.