Import Word file loses non-breaking hyphens

I've had problems importing some Word files created by professional translators. They're full of non-breaking spaces and non-breaking hyphens, and when I import the files into InDesign the non-breaking hyphens are completely lost (they aren't just turned into discretionary hyphens, etc.).

I've tried creating a new Word file, entering some text, adding a non-breaking hyphen, and then importing that file into InDesign, and the same problem occurs.

Could somebody please try to replicate this?

I'm using ID CS6 (version 8.0.1) and Word 2008 for Mac (version 12.2.3).

Thanks!