i haven’t updated the UI of my 4yo Roamio OTA, if that matters here. I keep finding cases where it won’t play a given Amazon Prime Free video, but the same title plays on my Apple TV. Unrelated but also a PITA is that 100% of the time I leave the Netflix app, the unit hangs on a black screen for a very long time. Sometimes button mashing seems to speed its recovery. No other player app does this. Doesn’t even matter if I played anything, or just loaded and exited Netflix.