I having a bunch of problems with the Roamio randomly freezing and rebooting in the middle of recording since yesterday. Poking around, I see some mentions of this, along with quotes that indicate that TiVo really doesn't have a clue about what's going on.
While it's most noticeable while watching live TV or recordings, it also happens at random when there is no activity on the DVR other than scheduled recordings.
So far it happened three times last night, losing chunks of Grimm and Helix, and again this morning while I was asleep, losing a chunk of CarTalk.
Any suggestions? The TiVo is directly connected to the router with no WiFi; I've rebooted the TiVo, cable modem, and router; and I don't use Netflix. Software version is 20.3.8-USA-6-846.