Al Q commented
A few additional comments on this problem: It doesn't happen if the data field is not assigned in the document. It doesn't happen if I Override master page items. It doesn't happen if I use a Smartstream imposition with the data fields and create an imposed pdf. Otherwise it happens in both CC17 and CC15 as soon as I plug in the data fields and create a pdf. It also did not happen on 2 other versions of the book that did not have graphics on the interior pages.