p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.
I hope you're doing well, and thank you for bringing this issue to our attention.
To assist you better, could you please provide the following details:
Device Information: Make and model of the device you're using.
Operating System Version: The version of the OS running on your device.
Acrobat Reader Mobile Version: You can find this by tapping on the profile icon within the app, then selecting “About Adobe Acrobat.”
Pending Updates: Please check if there are any updates for the app by visiting the Google Play Store or Samsung Store. If any updates are available, kindly install them and reboot your device.
What is the workflow/steps you are doing? a short video recording demonstrating the steps leading up to the issue would be extremely helpful in diagnosing the problem.
Once we have these details, we’ll be able to further investigate and work on a resolution.