How to recover annotations from a damaged PDF saved in iCloud?
I have a PDF textbook saved to iCloud that I've been annotating in Files using Markup for over a month now. Up until now, Files would occasionally crash and I'd lose my most recent changes, but it would always open again and show my previously saved annotations. Today the program suddenly closed and my PDF that was originally 130+MB is now only 35 MB. I tried opening it on another device and in other programs with no luck. Is there any way for me to restore this seemingly corrupted file? Even getting just the annotations back would be so helpful. I'm not sure what else to try. I'm using an iPad Air 4th gen running 18.0.1.
[Re-Titled by Moderator]
Original Title: PDF crashed, shrunk in size, and now won't open
iPad Air, iPadOS 18