When I open a second project my flex and gallery images in that project do not show. It’s always the second project opened, and the images reappear if that project is the only project open.
Can you share both those projects with us? so we can try and re-create the issue.
You can upload them to Elements Cloud and send the links to forumsupport@realmacsoftware.com.
Can confirm I suffer from the same issue. I don’t think it has always been the case though but no idea when I first noticed it.
I did more testing. It’s not happening on all projects, so it may be project specific and not an Elements issue. I have two projects I have uploaded for @dan to look at. I will send the links to the email shown above.