I have a couple of Fire Stick 4k devices on my network that I use with Channels. I also have an Apple TV 4k that is on my main television. I do not watch the Fire Sticks that often, but I have noticed the past few times I have watched any 1080i content from my HDHomeRun tuners it looked choppy. I turned on show stats and it is dropping a lot of frames. Several hundred in a very short period of time. I have tried switching from hardware to software decoding with the same results. This does not occur on 720p channels or on 480i content. Those channels play just fine. I can also view the channel in the native HDHomeRun app and it looks fine. This is something new that occurred after the latest update to the Fire TV interface. Before the last update, everything worked well. I was curious if anyone else has noticed this or if it is just me. I would appreciate any input.