We apologize for the delay in response to your query.
If you are still experiencing the same problem, would you mind sharing the file with us? As there isn't much that can be changed in the print setting of Acrobat Reader mobile app. So we would like to test the same at our end to see whats causing the problem.
"You can share the file with us via email. And you can send it to the email that is shared via private message. Please do mention your forum thread in the subject"