With so many complaints, looks like Roku would come up with a fix. I've been having the same issue with my Hisense Roku tv. It gets the updates....WHEN available. I've had it kick back to the home screen up to 6 times in a 15 min. span. I've gone thru doing restarts, unplugging it for 20 min. Even unplugged my router and rebooted both. And it would still happen.
A Walmart employee in the electronics dept. suggested changing the batteries in the remote control. At least it is the cheapest way to fix, if that's the issue. So far, it's been on nearly an hour and still working. We'll see.
Well, that failed! It lasted a little bit longer, but kicked it back to the home screen. So I know now it is not a remote control issue. I'm bout ready to throw this chinese made carp out the door.