I am using a HDHomeRun Dual (firmware 20170930) with a Roku stick (new black version).
After watching live tv on the Roku for about 5 minutes. It stops and the buffer screen shows up and never goes away. The only way I can get it back is to restart the plex software running on my windows 10 machine and restarting it or reboot the HDHomeRun (unplug from power).
It has happened (I believe) every single time I’ve tried it, which is dozens of times.