The Channels app on our Gen. 2 FTV has had freezing problems for some time. (I reported them, with crash diagnostics, several times.) Hit "back" once or twice and eventually it'll come up with "No tuner," then settle down to the normal main display you get when you enter the app. Used to be this would happen maybe once every week or so.
Now it's gotten really bad, as in being a daily occurrence. I'd say about ever since Monday or so.
Plus, now that I'm mentioning bugs: We have, for some time, experienced a greatly increased frequency of pauses on Live TV, on stations with solid signal and symbol values. Stations that never used to give us a problem. The WiFi connection is likewise solid as a rock. E.g.: Currently, with it in-use, speedtest reports 142.40Mb/s, 4.77ms, 2.39ms for Download, Latency and Jitter, respectively.
I'm not real pleased with Channels's performance on Live TV, lately