I have a document library where I am experiencing inconsistency in being able to add comments via file details pane. Some files have a comment box available while others don't. It doesn't appear to be based on file type, and as far as I know none of the files have any special editing restrictions such as read-only or password protection.
Is anyone aware of common reasons a file might not allow a comment to be added and/or is there a way to resolve this through sharepoint settings?