Edited prompts are gone :(

Hi everyone just as the title says. I kept using the same chat because it was easer to work on things that way for this instance, but then my edited prompts are gone so I can't see them. I don't think it's because of a limit, even so they shouldn't just disappear, and I don't really have lots of edited prompts + the whole chat itself is not too long. To make sure I edited one of my prompts and wrote "now I need 5.2" and previous one is gone.

Thankfully I don't need them much anymore but it still sucks. Is there a way to restore them ?

Thanks

note: this is inside a project file, and I tried things like using search bar or using another device and no luck.