Why "Create and Print Microsoft Word Document" doesn't create output in RDNG 6.0.2?

 We have a strange situation where certain people in the organization can't create Word docs using "Create and Print Microsoft Word Document".  This has been happening since the RDNG 6.0.2 upgrade but only happens with Chrome (v55.0.2883.87 m) and only on certain machines.  The report actually generates successfully (no errors), but then the file download never occurs (should automatically download Word doc).  However, selecting "Generate a Report for this View" and picking the "Print Module Table" report works just fine, and the Word doc is downloaded successfully.  Clearing browser cash does not help.  Logging in as admin user on same machine does not make a difference.  I could not find any errors in the browser console log.  I have not checked the RRDG server log, but I don't expect any errors since the report generation completed successfully.