Edit PDF not working

Hi I am desperate for someone to assist me. I have been editing a PDF file for the past two weeks on the adobe acrobat iPad app. The file is stored on my iCloud files app and this is how I have always accessed it and saved changes. Today when I opened the file in adobe pretty much all of my highlighting and comments have disappeared. If I remain in the files app all edits are still there but as soon as Ingo on adobe app they disappeared. I made copies of the file and saved in new location - still did not work. Also tried the adobe website and upload the file and edits do not appear. If I email the file to myself directly from iCloud files app and open it on my laptop browser the edits appear. Please can someone assist as this is hours of work I can not lose and have more work to do. Thank you