I am using HTS Tvheadend 3.9.316~g238636f-dirty with an HDHomerun Prime Cable Card. Attempting US_ATSC scanning and while services are indeed found, all names are empty or missing.
I am using a patched userhdhomerun in an attempt to support the Cable Card. When Tvheadend performs its initial scan, I can see the output of userhdhomerun with channel names displayed.
I am willing to test, test, test.
Thanks and Happy New Year!