Every few days (3-4) the DVR schedule stops loading. Programs will continue to be recorded for another day or two before the recording dies too. I have started checking every day to catch the problem early. This started one or two major releases ago. A restart of the server process restarts the clock.
I have the same issue. Over the last year I have had Plex installed on 2 different PCs, on the latest Plex server builds, and the Live TV/Guide stops working after about a week. A restart of Plex appears to fix the issue every time.
I have a SiliconDust HDHomeRun Connect.
I have been looking at retiring my ageing Windows Media Center, but it is rock solid when it comes to guide and recording using the same HDHomeRun tuner, Plex Live TV is still extremely flaky, rarely works.