Hope you are doing well.
We are sorry, you're having difficulties. Please help me with few details to understand your issue better.
We did try to replicate the behavior on our end, however, it is working fine. Make sure your application is updated. Reboot your device and then try. Try to reinstall the app once.
For Android Adobe Reader Mobile version: 126.96.36.19914
For more help refer to: https://www.adobe.com/devnet-docs/acrobat/android/en/troubleshooting.html
Let us know how it works at your end. If you have any further queries please feel free to reach out to us.