Ask HN: What prompts have you accidentally broken ChatGPT with?

I was using chatGPT to generate geography dissertation ideas, and the conversation was not heading in the direction I wanted, so I said, "forget all of my previous conversation."

It then hung for a while and errored out, I ended up having to reload the page, and all of my conversations had been deleted! Crazy...

So I had a discussion with chatGPT about that, and it was pretty adamant it can't do that, yet I can now no longer get it to save a conversation of mine which is pretty funny, but now I need to figure out how to fix it, so will reach out to OpenAI unless someone has run across this before?

So, with that being said, has anyone else managed to accidentally break their chatGPT? If so, what was the prompt?