I can't go back to the generations when being in the generative fill mode

If I choose to do a generative fill for one of the generations, I can no longer go back to the previous page. 
When I go back, I end up in the Adobe Firefly start page and need to start from scratch and I've also lost my prompt because of that. 

It would be great to be able to go back to all the 4 generations that is provided in the previous page, so I can keep generating variations of my prompt.