I don’t really watch live TV with my Plex and I rarely transcode because I’m usually watching a recorded program at home. My bandwidth/processors are powerful enough to watch the maximum video quality each time/on each device (without transcoding), so I can’t attest to those issues. Besides the glitch issue, which seems to okay now from daily router rebooting, the only other issue I had was the DVR “Refreshing guide data” stuck in “Initializing” for days. I managed to fix that by first upgrading the firmware on my HDhomerun Prime and changing a couple of settings in my router. I posted a detailed solution at this link DVR "Refreshing guide data" stuck in "Initializing" for days (scroll down near the bottom username NerdPants with picture attachment). There’s a possibility these changes will fix the errors you’re having as well even if you don’t have a HDhomerun device.
