Issue with Adobe fill and sign app on ipad

I use Acrobat Pro DC from creative cloud 2015 edition --- fully up-to-date

I create forms in Acrobat and then fill out the forms

I then save the forms to my cloud

If I open them back in Adobe Acrobat DC - works fine

I want to use the iOS app Adobe Fill & Sign for customers to sign the fields

When I open one of my forms in the iOS app all of the pre-filled out form fields are now empty!

None of the data is retained

what am I doing wrong?