iPad failed to sync with Google Drive, 5 hours of work lost

Hi all,

I am using Adobe Acrobat Reader on my iPad and was working on my thesis (read books, highlight, underline etc.). I spent 5 hours on working on a book that I have opened from google drive, leaving comments and highlights. The next day I opened the file and all my previous afternoon work was gone. No local save, no google sync. The last sync was at 13pm to google drive. I had another 5 hours of work afterwards that it failed to save.

Does Acrobat Reader have an Autosave function? Is it possible to recover a temp file or similar from that time?

Thank you for your help in advance!