Here's one I've never had happen before: When I placed a Word doc with perfectly normal footnotes into my ID document, none of the footnotes came along for the ride. Footnotes is checked in the Import Options dialog box, so that's not the problem. I've just upgraded to Office 365 from 2007...might it be something to do with that?
Try to save your docx as old .doc or rtf and than import file
That did the trick! Thankyouthankyouthankyou!