Hi there
++ Adding to the discussion
What is the version of the Adobe Scan app and the OS you are using? Tap on the profile icon > About Adobe Scan, try updating the app from the App Store, and reboot the device once.
Is this an issue with a specific PDF file or all the PDFs? Try using a different file and check. Also, as suggested in the earlier response, try downloading the files to your device locally, then renaming them and checking.
To rename an existing file, try the steps below:
- From any file list, tap the overflow icon next to the file that you want to rename.
- Tap Rename.
- Enter a new name.
- Tap Rename.
For more info, please check the help page https://adobe.ly/3YFVBXf