Tvheadend

With a new install the system works great, will create correct interface configuration for hdhomerun, once you restart tvheadend it will create one or more additional interfaces.

{
        "devid": "(null)/HDHomeRun.1/0000:7f60",
        "adapters": {
                "d374b5f778cb3646df57a5c9a60b3329": {
                        "rootpath": "/dev/dvb/adapter1",
                        "number": 0,
                        "frontends": {
                                "62ee49c6aae88791e168f3f5e2abb250": {
                                        "fe_path": "/dev/dvb/adapter1/frontend0",
                                        "dvr_path": "/dev/dvb/adapter1/dvr0",
                                        "dmx_path": "/dev/dvb/adapter1/demux0",
                                        "fe_number": 0,
                                        "fullmux": false,
                                        "noclosefe": false,
                                        "enabled": false,
                                        "priority": 0,
                                        "displayname": "/dev/dvb/adapter1/frontend0",
                                        "type": "ATSC" 
                                }
                        }
                }
        }
}

Once this occurs the system will no longer use the previous configured interface.
You will also notice aberrations related to the images on the page. This only occurs 3.9. I have a production configuration that does not do this.
BTW, I love how 3.9 works, very intuitive! Simpler mapping of channels!!!!