Found this issue documented on Reddit - I'm experiencing the same issue too.
Just recently started having an issue on my Roku 4k Streaming Stick. When I watch shows on the Roku Channel app, for example, America's Test Kitchen or At Home with Family Handyman, etc, right when the episodes time block ends and the next time block starts, the channel will just go to black. However, the TV is not turning off or going into any power saving mode. If I press the "OK" button, it stop brings up the little info bar at the lower half bottom, and when I change the channel, it starts playing again. This does not happen with any other RokuTV app. Only channels under the "Live TV" guide on Roku Channel app this happens with. I have tried updating the app, and also removing and re adding it back. I have not tried factory resetting it as I wanted to see if anyone had any suggestions or experienced this issue first before resorting to a complete reset. Again, all power savings features are turned off.
Another user thought perhaps the new LiveTV smart assistance could be contributing...looks like y'all are on that thread too.
Device Info - SO8Y41D4491X
Tracker 1X-250-534 GC 13.18.11
zip - 97223
Black screen lasts a minute or so before returning to screen saver mode [city with moving billboards, etc.]
I have a video but am not able to upload it.
