It's not that she's even trying to connect to my server intentionally. She is literally only using the channels app (local to the firestick) to watch OTA. Sometimes if there's a power outage or network glitch, and she loses connection via LAN to the HDHomerun, it automatically connects connects to my server. She's a bit older and in another state, so when this happens, she calls me asking she can't watch her local news or whatever. She doesn't understand why all of a sudden her locals have changed to NC instead of TN. At which point I tell her to reboot everything and I remove her as a client from the DVR again.
I have wised up though and added a smart plug and routine to the HDHomerun so she can just say "Alexa, fix TV" and it powers it off and back on a few minutes later. This fixes the issue 99% of the time.