ChatGPT deleting its own responses when I reach the limit for free GPT-o

So I've been working on a story with Chatgpt for few months now so the chat is very long. the world is well build and I have few characters already with backgrounds and on-going stories. yesterday I encountered a bug which messed up everything and I fear I will not be able to continue.

It happened when I entered a last prompt before reaching the limit yesterday. It all lagged. It looked like my text was not send because it was still in textbox, but when I refreshed it did send and I even got a response so didn't think much of it. Later when I continued, put more prompts and got more responses I reached the limit again and when I came back again these were just gone. With just my 2 not the most recent prompts send, but with no answer. No textbox for me to write, but with an error saying something went wrong and an option to generate the response again. But it already generated the response for these before and more. when I asked about it Chat told me he doesnt know what Im talking about.

Let me try to visualize that because it's quite complicated. The chat looked like this:
- prompt 1
- response 1
- prompt 2
- response 2
- prompt 3
- response 3
- prompt 4
- response 4

Now it looks like this:
- prompt 1
- response 1
- prompt 2
- prompt 3

With no responses 2 and 3 and missing all the prompts and responses after these missing.
I did clicked "generate again" button as that was my only option without textbox to write anything. and I did all the work with prompts again. I reached the limit again and when I came back I'm once again at the same spot I was before!

Have I reached the limit of a single chat? Can I somehow continue working in that or do I have to somehow move the whole world and stories to different one? Can it be fixed?