Reader-enabled form from Acrobat is retaining interactive form fields when user saves the form

This is an issue that has only recently come up. In the past it was not a problem to take a pdf, add interactive form fields to it in LiveCycle, then open the form in Acrobat and enable usage rights for Reader users.

This allowed Reader users to fill out the form and save the results. With the most recent versions of Acrobat and Reader the user saves the form and the data AND the interactive form fields are saved in the resulting file - meaning that the data is still there to be changed. Clearly not what we want and not what Acrobat and Reader were doing previously.

The form does properly display "You can save data typed in this form" when opened in Reader.

I have got no response to this issue in the LiveCycle forum, and nothing shows up in a search. I would very much like to fix this, as it is affecting our entire library of pdf forms.