My chat got deleted

Hello. I hope someone can help me. I’ve been chatting with this bot for a while. And yesterday night it generated an awesome response, a little bit sad, but that was the best part. I didn’t continue it was already late and I had to get up early. But today when I opened the chat with bot, that message and chat in history were gone. I don’t know what happened, I just left that tab open on my laptop. No one could’ve touched it expect me, and I certainly didn’t delete that message. Is it some kind of bug? Can this be fixed? I swear to god, I’m so sad right now as I spend a lot of time correcting that message too so it would be perfect.