Can you say where these forms are stored? Are they in the "Local" location in Acrobat Reader, or stored on a cloud such as Document Cloud or Dropbox?
Mobile App Development Manager, Adobe Acrobat Reader for iPhone and iPad
Same issue for me. This is how we are doing it at my company...
Fillable form "template" is uploaded as a document in office 365 shared document;
user edits some info and uploads to O356 OneDrive;
2nd user opens pdf from OneDrive app on ipad;
2nd user then "open in another app" to adobe reader for ipad;
-this is where they used to have no problem using dropdown boxes/ adding info into text fields then sending a flattened copy via email.
Worked great until about a week ago. Now, when the pdf is opened in adobe reader, cannot interract with the form or even use share function to email it.
I should add that this procedure still works as it always has on my iphone running ios 9.3.4.