Thanks for the reply Jason. I did try a couple different power supplies and made sure it wasn't overheating. As a last ditch try I returned the box to the store and got another one of the same device. That one has been working fine so far. I guess quality control on these things is not great. Maybe ...

Thanks AlbumMan! It's comforting that I'm not the only with various issues. I'm hoping the silence from the support folks on my diagnostic logs means they've found something interesting and are sorting through it. In the meantime I have to keep my wife's pleas to "just go back to Comcast" at bay :)

Additional crashes at 17:13 and 17:48 Eastern if they made it into the logs.

Sorry - I didn't realize the setting was per viewing device and used the pixel to turn it. I enabled it on the TV and just had a crash at 10:27pm Eastern.

HDHomeRun FLEX 4K firmware version 20250815, device id 10A4BCDB
onn 4K streaming device, Android TV OS build UR01.250103.029.C1.13655754
HDHomeRun app version 20250708

While watching live TV the picture will suddenly stop, the audio stutters for a second or two and the onn device crashes and ...

Thank you Jason. Can confirm that this is the issue. I borrowed another Roku and it works fine.

Switching to 720p vs 1080p does not effect the size of the picture. Some stations have even smaller pictures and a couple look normal. I moved the Roku to another television and it does the same thing in the HD HomeRun app. Netflix, Hulu, etc all work fine too.

Example image:

There is one channel that displays full screen, most other channels are about 75% and one is 25% of the screen. I sent diagnostic data tuning some of the channels about 10 min ago 10A4BCDB in case it is useful.

Using HDHomeRun FLEX 4K (firmware version 20250815) on a Roku 3800X streaming stick sw version 14.6 with the HD HomeRun app version 104.0 build 20250817. Tuning many ATSC 1.0 stations the video appears in a box in the upper left corner of the screen with the rest of the screen a solid green ...