How much calcium is in her diet? They lay soft eggs if they don't have enough calcium. Sometimes I get random soft eggs from my chickens even though there is nothing wrong with them. She should be ok. :)
I believe that this is just a "fairy egg" for more info link: https://www.fresheggsdaily.blog/2017/04/what-is-fairy-egg-and-why-do-chickens.html#:~:text=Despite%20the%20lack%20of%20a,air%20from%20penetrating%20the%20shell).