How to Fix PDF Comments and Tags Disappearing in Acrobat Reader
Question details
Users report data loss where tags, highlights, and comments added to PDF documents fail to save and disappear after closing the Acrobat Reader application.

- Product
- Adobe Acrobat Reader
- Device & OS
- iOS
- Scenario
- Editing a PDF document by adding annotations or comments and subsequently closing the application or putting the device to sleep.
- Observed behavior
- All recently added tags, highlights, and comments are lost and not reflected in the PDF document upon reopening.
Verify that your device has sufficient storage space to save local document changes, and ensure you have a stable internet connection if working with files stored in cloud services.
Save Changes Correctly and Update the Application
Ensure you are actively saving your annotations and using the latest version of the app to prevent known bug-related data loss.
Failing to manually commit changes before exiting the app or running an outdated version with known syncing bugs are the primary reasons for lost PDF annotations.
Tap the 'Done' button in the upper corner immediately after adding comments or highlights to ensure the changes are finalized.
Open the App Store on your iOS device, tap your profile icon, and check for available updates for Adobe Acrobat Reader.
Install version 19.01.01 or later, which contains specific developer patches designed to fix the lost-comments issue.

Prevent App Suspension and Storage Conflicts
Prevent the operating system from terminating the app's background processes before changes are permanently saved.
Edit and Save PDF Comments Seamlessly with WPS Office
Avoid frustrating data loss by using the highly stable WPS PDF editor. WPS Office provides a reliable, user-friendly environment to highlight, comment, and save PDF documents automatically on any device.
- 1. Open your PDF: Launch the WPS Office app on your mobile device or computer and open your PDF document.
- 2. Access annotation tools: Navigate to the 'Annotate' or 'Comment' tab located in the top menu bar.
- 3. Add your comments: Use the Highlight, Text Box, Note, or Draw tools to add your annotations directly onto the document.
- 4. Save changes securely: Click the 'Save' icon or tap 'Done' to instantly secure your changes to your local device or WPS Cloud storage.

Frequently Asked Questions
Why do my PDF highlights disappear when I reopen the file?
This typically occurs if the application was closed before the save action fully completed, if there was a synchronization interruption with your cloud storage, or due to a known saving bug in older versions of the PDF reader.
Does tapping 'Done' guarantee my comments are saved?
Yes, tapping 'Done' actively commits your current edits to the document file. However, if the file is stored in an external cloud service, you must also allow sufficient time for the network upload to finish before closing the app.
Can putting my device to sleep cause PDF data loss?
Yes. If your phone or tablet goes to sleep or locks while the PDF application is still actively writing data to local storage or syncing to the cloud, the process may be terminated, leading to unsaved comments.
Are my lost PDF comments recoverable?
Unfortunately, if the comments were not successfully committed to the storage drive before the app closed or crashed, they cannot be recovered unless the application successfully generated an automatic background backup file.




