Today I have realized that all the changes made (e.g. highlights) in my local files suddenly dissappeared, the files are still here but without the changes.
I have an android tablet and I normally download files from my linked Google Drive account.
Recently I haven´t updated OS, software or the Adobe app; neither had any app crashes or system crashes.
The only thing I noticed was that my google associated account changed, i.e., email@example.com updated automatically to firstname.lastname@example.org , so I was asked to sign in again to my account inside de Adobe app. However files were local copies, are still in the local memory but without any of the changes.