Roku app repeatedly kicks me out of any channel I’m watching to home screen. What causes this? How can i solve this?
These things are just little special purpose computers. Like their big brothers sometimes you need to clear things out by restarting them.
Restart via Settings > System > System restart (Or for Roku TV: Settings > System > Power > System restart)
If a restart doesn't do it, try pulling the power plug to the device for a minute or so then plugging it back in.
Let us know how you make out.