We have two rokus, a roku 2 and a roku 3.
I noticed our 3 had updated and a day or so later it started having issues. I'd wake up and turn on the tv and roku would be stuck on the reboot screen. I would have to unplug it to get to do anything. It's like this every morning now.
Now It's begun randomly restarting. This nomally happens when we're not watching anything like when we're deciding what to watch next.
Our roku 2 seems fine perhaps it didn't get updated?
Turning off our screen saver seems to have solve the problem.