PS Express not saving my projects

I recently updated PS Express and now when I open a picture from my library in the app and make edits to the picture (like use the heal brush) and then exit the edit (not exit the app) and return to the same project a minute larer, all of my work and edits are gone. Again, this happens even when I don't close the app. It's happening on all of my Apple mobile devices - iPad Pro V3, iPad Mini, and iPhone Pro 15. This is getting really frustrating and I'm ready to abandon the app. I'm hoping someone has a suggestion or can explain what's going on. Thanks!