I had this issue earlier also with Acrobat Reader 11.7.2 on Lollipop 5.02
but after a system component update the issue "sorted itself out"... right
now I tried to run this on a Galaxy s6 Android 5.02, Acrobat DC fails, and
at the same time, on the same phone Acrobat 11.7.2 (pre DC) succeeds. This
is the case also with my other forms.
Thanks for getting back to me. I'll try to get my hands on a 5.1 v.