So I had this multi-hour, intricate project with dozens of images, shapes, nested groups, and an embedded designer file. I had double tapped it to open it and make a few tweaks. I then left things as they were, with the embedded document still open, as I had to switch tasks and work in different apps entirely, which caused AP to be dumped out of ram. Upon launching AP again I noticed that the thumbnail of my project was replaced by one of the embedded designer file. When I tried to open it, AP returned an error message that said « loading failed. Unable to load document. »
I have tried relaunching AP, rebooting the iPad. No effect: the document still won’t load. So I guess the file is permanently corrupted.
Next, I experimented a bit. I have tried duplicating the document. Nothing happened. Trying to save it caused AP to just instantly crash. Renaming did work, but I still wasn’t able to save or duplicate the renamed document.
I also created a new document that contained the same embed and a couple of dozen pictures to very roughly mimic the original project and tried to reproduce the bug. I managed to get AP dumped out of ram while the embedded document was open, but after relaunching AP, the thumbnail was the one of the project, and there was no corruption.
Finally I stashed the embedded designer document in a nested group and tried again. Upon relaunch I was greeted with a thumbnail of the embedded document instead of one of the whole project. The document was corrupted: unloadable, unsavable, etc…