I also have this problem. Have had it for a few days.
I think I have figured out what is occurring even if nothing I do fixes it.
1. The prompt goes through and a response is generated.
2. Even though a response was generated, it doesn’t save.
3. If you reload the page, you can tell it didn’t go through as it just says the whole “There was an error generating a response” thing, alongside the regenerate button.
4. So since this response didn’t save, if you try to do another prompt the last prompt, since it failed to generate a response, it will just fuse with the new prompt.
5. the cycle continues.
IS how I think it works.