We are having a similar issue. I'm running Windows 10, started within the past week. Sending and Receiving faxes work fine, but when I print a fax I received in Windows Fax and Scan to my HP printer, nothing happens - no error message, no print job appears in the print queue. All other apps print fine to the printer, and the "Print Test Page" works fine from the printer's properties dialog.
Also, If I print a fax to the "Microsoft Print to PDF" printer, it asks me for the filename as usual, but the pdf that is created is 0 bytes long (it's empty.) Again, other apps and the Test Page work fine while printing to this printer.
And yes, I have restarted the computer multiple times, but no change. This problem appears to be in the Windows Fax and Scan application and not the Windows print subsystem. Any suggestions?
Thank you!