good morning FOR ABOUT TWO WEEKS I HAVE NOT UNDERSTOOD WHY THE TEXT IN THE FORMS THAT CAN BE FILLED OUT FROM THE ADOBE APPLICATION ON ANDROID SMARTPHONE OR TABLET WHEN I GO TO MODIFY OR INTEGRATE THE TEXT IT IS DOUBLED WHILE IF THE SAME FILE IS MODIFIED FROM A WINDOWS PC THE TEXT IS CORRECT
Is this happening with just that file or with every PDF document?
Meanwhile, three things come to my mind:
turn off the mobile device and power on the device (not a restart)
If your Acrobat Mobile app isn't updated, try to update the app to its latest version from its app store and try again
If your app is already updated to its latest version, Backup all of your PDF documents in your mobile device, and uninstall/reinstall the app; a phone restart may be required after this procedure
Ok, as mentioned I could reproduce the issue on Android, not only with your PDF but with others, too. Also I couldn't find the error in your file that I knew to cause similar issues. So apparently this is an error in the current Acrobat for Android.
The issue appears to be that Acrobat, while editing a field, displays both the current (edited) version of the field contents and the former (unchanged) version thereof. This is especially visible when the original contents had been filled in with some other software that formatted the text slightly differently, or when one edits at the start of the former contents.