We are having the same problem. It just started happening in the last few months. It doesn't matter what we're watching through Roku, whether Xfinity, Netflix, Sling, etc. It doesn't happen if we're watching regular antenna TV.
Hi,
Thanks for the inquiry.
Does the device turn off completely, or does it return to the home screen?
If the device is returning to the home screen, it is possible what you are seeing is the Bandwidth Saver. For more information regarding the Bandwidth Saver, visit our Support Page here: How do I use Bandwidth Saver to avoid going over my internet data cap?
Please keep us posted.
Thanks,
Danny