Since I recreated my container with the latest docker image, it doesn't matter if I edit files or create new files and save changes manually or use autosave: nothing is saved.
I already lost a big spreadsheet because I am used to FileRun + OnlyOffice working fine and autosaving.
I am not sure what changed?
I even copied the onlyoffice app.php file from my backup, I tested saving files successfully, but apparently only the first file edit was saved.
When I create a new file, add some text and close it, re-open it, the text is there. But when I am working on a newly created file for a few minutes, close it and later open it again, it is empty!
Since there is very little to debug here, I am posting this here, hoping to see if others have the same experience.
Customer support service by UserEcho